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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
4bbbc1ad JY |
2 | /* |
3 | * GPMC support functions | |
4 | * | |
5 | * Copyright (C) 2005-2006 Nokia Corporation | |
6 | * | |
7 | * Author: Juha Yrjola | |
8 | * | |
44169075 SS |
9 | * Copyright (C) 2009 Texas Instruments |
10 | * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com> | |
4bbbc1ad | 11 | */ |
db97eb7d | 12 | #include <linux/irq.h> |
4bbbc1ad JY |
13 | #include <linux/kernel.h> |
14 | #include <linux/init.h> | |
15 | #include <linux/err.h> | |
16 | #include <linux/clk.h> | |
f37e4580 ID |
17 | #include <linux/ioport.h> |
18 | #include <linux/spinlock.h> | |
fced80c7 | 19 | #include <linux/io.h> |
d2d00862 | 20 | #include <linux/gpio/driver.h> |
a0752e9c | 21 | #include <linux/gpio/consumer.h> /* GPIO descriptor enum */ |
5923ea6c | 22 | #include <linux/gpio/machine.h> |
db97eb7d | 23 | #include <linux/interrupt.h> |
384258f2 | 24 | #include <linux/irqdomain.h> |
da496873 | 25 | #include <linux/platform_device.h> |
bc6b1e7b | 26 | #include <linux/of.h> |
cdd6928c | 27 | #include <linux/of_address.h> |
bc6b1e7b | 28 | #include <linux/of_device.h> |
b1dc1ca9 | 29 | #include <linux/of_platform.h> |
e639cd5b | 30 | #include <linux/omap-gpmc.h> |
b3f5525c | 31 | #include <linux/pm_runtime.h> |
07852c3f | 32 | #include <linux/sizes.h> |
4bbbc1ad | 33 | |
bc3668ea | 34 | #include <linux/platform_data/mtd-nand-omap2.h> |
4bbbc1ad | 35 | |
7f245162 | 36 | #include <asm/mach-types.h> |
72d0f1c3 | 37 | |
4be48fd5 AM |
38 | #define DEVICE_NAME "omap-gpmc" |
39 | ||
fd1dc87d | 40 | /* GPMC register offsets */ |
4bbbc1ad JY |
41 | #define GPMC_REVISION 0x00 |
42 | #define GPMC_SYSCONFIG 0x10 | |
43 | #define GPMC_SYSSTATUS 0x14 | |
44 | #define GPMC_IRQSTATUS 0x18 | |
45 | #define GPMC_IRQENABLE 0x1c | |
46 | #define GPMC_TIMEOUT_CONTROL 0x40 | |
47 | #define GPMC_ERR_ADDRESS 0x44 | |
48 | #define GPMC_ERR_TYPE 0x48 | |
49 | #define GPMC_CONFIG 0x50 | |
50 | #define GPMC_STATUS 0x54 | |
51 | #define GPMC_PREFETCH_CONFIG1 0x1e0 | |
52 | #define GPMC_PREFETCH_CONFIG2 0x1e4 | |
15e02a3b | 53 | #define GPMC_PREFETCH_CONTROL 0x1ec |
4bbbc1ad JY |
54 | #define GPMC_PREFETCH_STATUS 0x1f0 |
55 | #define GPMC_ECC_CONFIG 0x1f4 | |
56 | #define GPMC_ECC_CONTROL 0x1f8 | |
57 | #define GPMC_ECC_SIZE_CONFIG 0x1fc | |
948d38e7 | 58 | #define GPMC_ECC1_RESULT 0x200 |
8d602cf5 | 59 | #define GPMC_ECC_BCH_RESULT_0 0x240 /* not available on OMAP2 */ |
2fdf0c98 AM |
60 | #define GPMC_ECC_BCH_RESULT_1 0x244 /* not available on OMAP2 */ |
61 | #define GPMC_ECC_BCH_RESULT_2 0x248 /* not available on OMAP2 */ | |
62 | #define GPMC_ECC_BCH_RESULT_3 0x24c /* not available on OMAP2 */ | |
27c9fd60 | 63 | #define GPMC_ECC_BCH_RESULT_4 0x300 /* not available on OMAP2 */ |
64 | #define GPMC_ECC_BCH_RESULT_5 0x304 /* not available on OMAP2 */ | |
65 | #define GPMC_ECC_BCH_RESULT_6 0x308 /* not available on OMAP2 */ | |
4bbbc1ad | 66 | |
2c65e744 YY |
67 | /* GPMC ECC control settings */ |
68 | #define GPMC_ECC_CTRL_ECCCLEAR 0x100 | |
69 | #define GPMC_ECC_CTRL_ECCDISABLE 0x000 | |
70 | #define GPMC_ECC_CTRL_ECCREG1 0x001 | |
71 | #define GPMC_ECC_CTRL_ECCREG2 0x002 | |
72 | #define GPMC_ECC_CTRL_ECCREG3 0x003 | |
73 | #define GPMC_ECC_CTRL_ECCREG4 0x004 | |
74 | #define GPMC_ECC_CTRL_ECCREG5 0x005 | |
75 | #define GPMC_ECC_CTRL_ECCREG6 0x006 | |
76 | #define GPMC_ECC_CTRL_ECCREG7 0x007 | |
77 | #define GPMC_ECC_CTRL_ECCREG8 0x008 | |
78 | #define GPMC_ECC_CTRL_ECCREG9 0x009 | |
79 | ||
e378d22b RQ |
80 | #define GPMC_CONFIG_LIMITEDADDRESS BIT(1) |
81 | ||
512d73d1 RQ |
82 | #define GPMC_STATUS_EMPTYWRITEBUFFERSTATUS BIT(0) |
83 | ||
559d94b0 AM |
84 | #define GPMC_CONFIG2_CSEXTRADELAY BIT(7) |
85 | #define GPMC_CONFIG3_ADVEXTRADELAY BIT(7) | |
86 | #define GPMC_CONFIG4_OEEXTRADELAY BIT(7) | |
87 | #define GPMC_CONFIG4_WEEXTRADELAY BIT(23) | |
88 | #define GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN BIT(6) | |
89 | #define GPMC_CONFIG6_CYCLE2CYCLESAMECSEN BIT(7) | |
90 | ||
948d38e7 | 91 | #define GPMC_CS0_OFFSET 0x60 |
4bbbc1ad | 92 | #define GPMC_CS_SIZE 0x30 |
2fdf0c98 | 93 | #define GPMC_BCH_SIZE 0x10 |
4bbbc1ad | 94 | |
bdd7e033 RQ |
95 | /* |
96 | * The first 1MB of GPMC address space is typically mapped to | |
97 | * the internal ROM. Never allocate the first page, to | |
98 | * facilitate bug detection; even if we didn't boot from ROM. | |
99 | * As GPMC minimum partition size is 16MB we can only start from | |
100 | * there. | |
101 | */ | |
102 | #define GPMC_MEM_START 0x1000000 | |
f37e4580 | 103 | #define GPMC_MEM_END 0x3FFFFFFF |
f37e4580 ID |
104 | |
105 | #define GPMC_CHUNK_SHIFT 24 /* 16 MB */ | |
106 | #define GPMC_SECTION_SHIFT 28 /* 128 MB */ | |
107 | ||
59e9c5ae | 108 | #define CS_NUM_SHIFT 24 |
109 | #define ENABLE_PREFETCH (0x1 << 7) | |
110 | #define DMA_MPU_MODE 2 | |
111 | ||
98397f1c KK |
112 | #define GPMC_REVISION_MAJOR(l) (((l) >> 4) & 0xf) |
113 | #define GPMC_REVISION_MINOR(l) ((l) & 0xf) | |
da496873 AM |
114 | |
115 | #define GPMC_HAS_WR_ACCESS 0x1 | |
116 | #define GPMC_HAS_WR_DATA_MUX_BUS 0x2 | |
aa8d4767 | 117 | #define GPMC_HAS_MUX_AAD 0x4 |
da496873 | 118 | |
9f833156 JH |
119 | #define GPMC_NR_WAITPINS 4 |
120 | ||
e639cd5b TL |
121 | #define GPMC_CS_CONFIG1 0x00 |
122 | #define GPMC_CS_CONFIG2 0x04 | |
123 | #define GPMC_CS_CONFIG3 0x08 | |
124 | #define GPMC_CS_CONFIG4 0x0c | |
125 | #define GPMC_CS_CONFIG5 0x10 | |
126 | #define GPMC_CS_CONFIG6 0x14 | |
127 | #define GPMC_CS_CONFIG7 0x18 | |
128 | #define GPMC_CS_NAND_COMMAND 0x1c | |
129 | #define GPMC_CS_NAND_ADDRESS 0x20 | |
130 | #define GPMC_CS_NAND_DATA 0x24 | |
131 | ||
132 | /* Control Commands */ | |
133 | #define GPMC_CONFIG_RDY_BSY 0x00000001 | |
134 | #define GPMC_CONFIG_DEV_SIZE 0x00000002 | |
135 | #define GPMC_CONFIG_DEV_TYPE 0x00000003 | |
e639cd5b TL |
136 | |
137 | #define GPMC_CONFIG1_WRAPBURST_SUPP (1 << 31) | |
138 | #define GPMC_CONFIG1_READMULTIPLE_SUPP (1 << 30) | |
139 | #define GPMC_CONFIG1_READTYPE_ASYNC (0 << 29) | |
140 | #define GPMC_CONFIG1_READTYPE_SYNC (1 << 29) | |
141 | #define GPMC_CONFIG1_WRITEMULTIPLE_SUPP (1 << 28) | |
142 | #define GPMC_CONFIG1_WRITETYPE_ASYNC (0 << 27) | |
143 | #define GPMC_CONFIG1_WRITETYPE_SYNC (1 << 27) | |
98397f1c | 144 | #define GPMC_CONFIG1_CLKACTIVATIONTIME(val) (((val) & 3) << 25) |
4b613e9b RA |
145 | /** CLKACTIVATIONTIME Max Ticks */ |
146 | #define GPMC_CONFIG1_CLKACTIVATIONTIME_MAX 2 | |
98397f1c | 147 | #define GPMC_CONFIG1_PAGE_LEN(val) (((val) & 3) << 23) |
4b613e9b RA |
148 | /** ATTACHEDDEVICEPAGELENGTH Max Value */ |
149 | #define GPMC_CONFIG1_ATTACHEDDEVICEPAGELENGTH_MAX 2 | |
e639cd5b TL |
150 | #define GPMC_CONFIG1_WAIT_READ_MON (1 << 22) |
151 | #define GPMC_CONFIG1_WAIT_WRITE_MON (1 << 21) | |
98397f1c | 152 | #define GPMC_CONFIG1_WAIT_MON_TIME(val) (((val) & 3) << 18) |
2e676901 RA |
153 | /** WAITMONITORINGTIME Max Ticks */ |
154 | #define GPMC_CONFIG1_WAITMONITORINGTIME_MAX 2 | |
98397f1c KK |
155 | #define GPMC_CONFIG1_WAIT_PIN_SEL(val) (((val) & 3) << 16) |
156 | #define GPMC_CONFIG1_DEVICESIZE(val) (((val) & 3) << 12) | |
e639cd5b | 157 | #define GPMC_CONFIG1_DEVICESIZE_16 GPMC_CONFIG1_DEVICESIZE(1) |
4b613e9b RA |
158 | /** DEVICESIZE Max Value */ |
159 | #define GPMC_CONFIG1_DEVICESIZE_MAX 1 | |
98397f1c | 160 | #define GPMC_CONFIG1_DEVICETYPE(val) (((val) & 3) << 10) |
e639cd5b | 161 | #define GPMC_CONFIG1_DEVICETYPE_NOR GPMC_CONFIG1_DEVICETYPE(0) |
98397f1c | 162 | #define GPMC_CONFIG1_MUXTYPE(val) (((val) & 3) << 8) |
e639cd5b | 163 | #define GPMC_CONFIG1_TIME_PARA_GRAN (1 << 4) |
98397f1c | 164 | #define GPMC_CONFIG1_FCLK_DIV(val) ((val) & 3) |
e639cd5b TL |
165 | #define GPMC_CONFIG1_FCLK_DIV2 (GPMC_CONFIG1_FCLK_DIV(1)) |
166 | #define GPMC_CONFIG1_FCLK_DIV3 (GPMC_CONFIG1_FCLK_DIV(2)) | |
167 | #define GPMC_CONFIG1_FCLK_DIV4 (GPMC_CONFIG1_FCLK_DIV(3)) | |
168 | #define GPMC_CONFIG7_CSVALID (1 << 6) | |
169 | ||
9c4f757e SP |
170 | #define GPMC_CONFIG7_BASEADDRESS_MASK 0x3f |
171 | #define GPMC_CONFIG7_CSVALID_MASK BIT(6) | |
172 | #define GPMC_CONFIG7_MASKADDRESS_OFFSET 8 | |
173 | #define GPMC_CONFIG7_MASKADDRESS_MASK (0xf << GPMC_CONFIG7_MASKADDRESS_OFFSET) | |
174 | /* All CONFIG7 bits except reserved bits */ | |
175 | #define GPMC_CONFIG7_MASK (GPMC_CONFIG7_BASEADDRESS_MASK | \ | |
176 | GPMC_CONFIG7_CSVALID_MASK | \ | |
177 | GPMC_CONFIG7_MASKADDRESS_MASK) | |
178 | ||
e639cd5b TL |
179 | #define GPMC_DEVICETYPE_NOR 0 |
180 | #define GPMC_DEVICETYPE_NAND 2 | |
181 | #define GPMC_CONFIG_WRITEPROTECT 0x00000010 | |
182 | #define WR_RD_PIN_MONITORING 0x00600000 | |
183 | ||
e639cd5b TL |
184 | /* ECC commands */ |
185 | #define GPMC_ECC_READ 0 /* Reset Hardware ECC for read */ | |
186 | #define GPMC_ECC_WRITE 1 /* Reset Hardware ECC for write */ | |
187 | #define GPMC_ECC_READSYN 2 /* Reset before syndrom is read back */ | |
188 | ||
b2bac25a | 189 | #define GPMC_NR_NAND_IRQS 2 /* number of NAND specific IRQs */ |
6b6c32fc | 190 | |
7f2e8c58 RA |
191 | enum gpmc_clk_domain { |
192 | GPMC_CD_FCLK, | |
193 | GPMC_CD_CLK | |
194 | }; | |
195 | ||
9ed7a776 TL |
196 | struct gpmc_cs_data { |
197 | const char *name; | |
198 | ||
199 | #define GPMC_CS_RESERVED (1 << 0) | |
200 | u32 flags; | |
201 | ||
202 | struct resource mem; | |
203 | }; | |
204 | ||
a2d3e7ba RN |
205 | /* Structure to save gpmc cs context */ |
206 | struct gpmc_cs_config { | |
207 | u32 config1; | |
208 | u32 config2; | |
209 | u32 config3; | |
210 | u32 config4; | |
211 | u32 config5; | |
212 | u32 config6; | |
213 | u32 config7; | |
214 | int is_valid; | |
215 | }; | |
216 | ||
217 | /* | |
218 | * Structure to save/restore gpmc context | |
219 | * to support core off on OMAP3 | |
220 | */ | |
221 | struct omap3_gpmc_regs { | |
222 | u32 sysconfig; | |
223 | u32 irqenable; | |
224 | u32 timeout_ctrl; | |
225 | u32 config; | |
226 | u32 prefetch_config1; | |
227 | u32 prefetch_config2; | |
228 | u32 prefetch_control; | |
229 | struct gpmc_cs_config cs_context[GPMC_CS_NUM]; | |
230 | }; | |
231 | ||
384258f2 RQ |
232 | struct gpmc_device { |
233 | struct device *dev; | |
234 | int irq; | |
235 | struct irq_chip irq_chip; | |
d2d00862 | 236 | struct gpio_chip gpio_chip; |
b2bac25a | 237 | int nirqs; |
384258f2 RQ |
238 | }; |
239 | ||
240 | static struct irq_domain *gpmc_irq_domain; | |
6b6c32fc | 241 | |
f37e4580 | 242 | static struct resource gpmc_mem_root; |
9ed7a776 | 243 | static struct gpmc_cs_data gpmc_cs[GPMC_CS_NUM]; |
87b247c4 | 244 | static DEFINE_SPINLOCK(gpmc_mem_lock); |
6797b4fe | 245 | /* Define chip-selects as reserved by default until probe completes */ |
f34f3716 | 246 | static unsigned int gpmc_cs_num = GPMC_CS_NUM; |
9f833156 | 247 | static unsigned int gpmc_nr_waitpins; |
da496873 | 248 | static resource_size_t phys_base, mem_size; |
1cd53458 | 249 | static unsigned int gpmc_capability; |
fd1dc87d | 250 | static void __iomem *gpmc_base; |
4bbbc1ad | 251 | |
fd1dc87d | 252 | static struct clk *gpmc_l3_clk; |
4bbbc1ad | 253 | |
db97eb7d SG |
254 | static irqreturn_t gpmc_handle_irq(int irq, void *dev); |
255 | ||
4bbbc1ad JY |
256 | static void gpmc_write_reg(int idx, u32 val) |
257 | { | |
edfaf05c | 258 | writel_relaxed(val, gpmc_base + idx); |
4bbbc1ad JY |
259 | } |
260 | ||
261 | static u32 gpmc_read_reg(int idx) | |
262 | { | |
edfaf05c | 263 | return readl_relaxed(gpmc_base + idx); |
4bbbc1ad JY |
264 | } |
265 | ||
266 | void gpmc_cs_write_reg(int cs, int idx, u32 val) | |
267 | { | |
268 | void __iomem *reg_addr; | |
269 | ||
948d38e7 | 270 | reg_addr = gpmc_base + GPMC_CS0_OFFSET + (cs * GPMC_CS_SIZE) + idx; |
edfaf05c | 271 | writel_relaxed(val, reg_addr); |
4bbbc1ad JY |
272 | } |
273 | ||
3fc089e7 | 274 | static u32 gpmc_cs_read_reg(int cs, int idx) |
4bbbc1ad | 275 | { |
fd1dc87d PW |
276 | void __iomem *reg_addr; |
277 | ||
948d38e7 | 278 | reg_addr = gpmc_base + GPMC_CS0_OFFSET + (cs * GPMC_CS_SIZE) + idx; |
edfaf05c | 279 | return readl_relaxed(reg_addr); |
4bbbc1ad JY |
280 | } |
281 | ||
fd1dc87d | 282 | /* TODO: Add support for gpmc_fck to clock framework and use it */ |
3fc089e7 | 283 | static unsigned long gpmc_get_fclk_period(void) |
4bbbc1ad | 284 | { |
fd1dc87d PW |
285 | unsigned long rate = clk_get_rate(gpmc_l3_clk); |
286 | ||
fd1dc87d PW |
287 | rate /= 1000; |
288 | rate = 1000000000 / rate; /* In picoseconds */ | |
289 | ||
290 | return rate; | |
4bbbc1ad JY |
291 | } |
292 | ||
7f2e8c58 RA |
293 | /** |
294 | * gpmc_get_clk_period - get period of selected clock domain in ps | |
80c4f5a8 KK |
295 | * @cs: Chip Select Region. |
296 | * @cd: Clock Domain. | |
7f2e8c58 RA |
297 | * |
298 | * GPMC_CS_CONFIG1 GPMCFCLKDIVIDER for cs has to be setup | |
299 | * prior to calling this function with GPMC_CD_CLK. | |
300 | */ | |
301 | static unsigned long gpmc_get_clk_period(int cs, enum gpmc_clk_domain cd) | |
302 | { | |
7f2e8c58 RA |
303 | unsigned long tick_ps = gpmc_get_fclk_period(); |
304 | u32 l; | |
305 | int div; | |
306 | ||
307 | switch (cd) { | |
308 | case GPMC_CD_CLK: | |
309 | /* get current clk divider */ | |
310 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1); | |
311 | div = (l & 0x03) + 1; | |
312 | /* get GPMC_CLK period */ | |
313 | tick_ps *= div; | |
314 | break; | |
315 | case GPMC_CD_FCLK: | |
7f2e8c58 RA |
316 | default: |
317 | break; | |
318 | } | |
319 | ||
320 | return tick_ps; | |
7f2e8c58 RA |
321 | } |
322 | ||
323 | static unsigned int gpmc_ns_to_clk_ticks(unsigned int time_ns, int cs, | |
324 | enum gpmc_clk_domain cd) | |
4bbbc1ad JY |
325 | { |
326 | unsigned long tick_ps; | |
327 | ||
328 | /* Calculate in picosecs to yield more exact results */ | |
7f2e8c58 | 329 | tick_ps = gpmc_get_clk_period(cs, cd); |
4bbbc1ad JY |
330 | |
331 | return (time_ns * 1000 + tick_ps - 1) / tick_ps; | |
332 | } | |
333 | ||
7f2e8c58 RA |
334 | static unsigned int gpmc_ns_to_ticks(unsigned int time_ns) |
335 | { | |
336 | return gpmc_ns_to_clk_ticks(time_ns, /* any CS */ 0, GPMC_CD_FCLK); | |
337 | } | |
338 | ||
3fc089e7 | 339 | static unsigned int gpmc_ps_to_ticks(unsigned int time_ps) |
a3551f5b AH |
340 | { |
341 | unsigned long tick_ps; | |
342 | ||
343 | /* Calculate in picosecs to yield more exact results */ | |
344 | tick_ps = gpmc_get_fclk_period(); | |
345 | ||
346 | return (time_ps + tick_ps - 1) / tick_ps; | |
347 | } | |
348 | ||
3950fffd BX |
349 | static unsigned int gpmc_clk_ticks_to_ns(unsigned int ticks, int cs, |
350 | enum gpmc_clk_domain cd) | |
7f2e8c58 RA |
351 | { |
352 | return ticks * gpmc_get_clk_period(cs, cd) / 1000; | |
353 | } | |
354 | ||
fd1dc87d PW |
355 | unsigned int gpmc_ticks_to_ns(unsigned int ticks) |
356 | { | |
7f2e8c58 | 357 | return gpmc_clk_ticks_to_ns(ticks, /* any CS */ 0, GPMC_CD_FCLK); |
fd1dc87d PW |
358 | } |
359 | ||
246da26d AM |
360 | static unsigned int gpmc_ticks_to_ps(unsigned int ticks) |
361 | { | |
362 | return ticks * gpmc_get_fclk_period(); | |
363 | } | |
364 | ||
365 | static unsigned int gpmc_round_ps_to_ticks(unsigned int time_ps) | |
366 | { | |
367 | unsigned long ticks = gpmc_ps_to_ticks(time_ps); | |
368 | ||
369 | return ticks * gpmc_get_fclk_period(); | |
370 | } | |
371 | ||
559d94b0 AM |
372 | static inline void gpmc_cs_modify_reg(int cs, int reg, u32 mask, bool value) |
373 | { | |
374 | u32 l; | |
375 | ||
376 | l = gpmc_cs_read_reg(cs, reg); | |
377 | if (value) | |
378 | l |= mask; | |
379 | else | |
380 | l &= ~mask; | |
381 | gpmc_cs_write_reg(cs, reg, l); | |
382 | } | |
383 | ||
384 | static void gpmc_cs_bool_timings(int cs, const struct gpmc_bool_timings *p) | |
385 | { | |
386 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG1, | |
387 | GPMC_CONFIG1_TIME_PARA_GRAN, | |
388 | p->time_para_granularity); | |
389 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG2, | |
390 | GPMC_CONFIG2_CSEXTRADELAY, p->cs_extra_delay); | |
391 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG3, | |
392 | GPMC_CONFIG3_ADVEXTRADELAY, p->adv_extra_delay); | |
393 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4, | |
394 | GPMC_CONFIG4_OEEXTRADELAY, p->oe_extra_delay); | |
395 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG4, | |
8f50b8e5 | 396 | GPMC_CONFIG4_WEEXTRADELAY, p->we_extra_delay); |
559d94b0 AM |
397 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6, |
398 | GPMC_CONFIG6_CYCLE2CYCLESAMECSEN, | |
399 | p->cycle2cyclesamecsen); | |
400 | gpmc_cs_modify_reg(cs, GPMC_CS_CONFIG6, | |
401 | GPMC_CONFIG6_CYCLE2CYCLEDIFFCSEN, | |
402 | p->cycle2cyclediffcsen); | |
403 | } | |
404 | ||
63aa945b | 405 | #ifdef CONFIG_OMAP_GPMC_DEBUG |
563dbb26 RA |
406 | /** |
407 | * get_gpmc_timing_reg - read a timing parameter and print DTS settings for it. | |
408 | * @cs: Chip Select Region | |
409 | * @reg: GPMC_CS_CONFIGn register offset. | |
410 | * @st_bit: Start Bit | |
411 | * @end_bit: End Bit. Must be >= @st_bit. | |
80c4f5a8 | 412 | * @max: Maximum parameter value (before optional @shift). |
4b613e9b | 413 | * If 0, maximum is as high as @st_bit and @end_bit allow. |
563dbb26 | 414 | * @name: DTS node name, w/o "gpmc," |
7f2e8c58 RA |
415 | * @cd: Clock Domain of timing parameter. |
416 | * @shift: Parameter value left shifts @shift, which is then printed instead of value. | |
563dbb26 RA |
417 | * @raw: Raw Format Option. |
418 | * raw format: gpmc,name = <value> | |
419 | * tick format: gpmc,name = <value> /‍* x ns -- y ns; x ticks *‍/ | |
420 | * Where x ns -- y ns result in the same tick value. | |
4b613e9b | 421 | * When @max is exceeded, "invalid" is printed inside comment. |
563dbb26 | 422 | * @noval: Parameter values equal to 0 are not printed. |
563dbb26 RA |
423 | * @return: Specified timing parameter (after optional @shift). |
424 | * | |
425 | */ | |
7f2e8c58 RA |
426 | static int get_gpmc_timing_reg( |
427 | /* timing specifiers */ | |
4b613e9b | 428 | int cs, int reg, int st_bit, int end_bit, int max, |
7f2e8c58 RA |
429 | const char *name, const enum gpmc_clk_domain cd, |
430 | /* value transform */ | |
431 | int shift, | |
432 | /* format specifiers */ | |
433 | bool raw, bool noval) | |
35ac051e TL |
434 | { |
435 | u32 l; | |
563dbb26 RA |
436 | int nr_bits; |
437 | int mask; | |
4b613e9b | 438 | bool invalid; |
35ac051e TL |
439 | |
440 | l = gpmc_cs_read_reg(cs, reg); | |
441 | nr_bits = end_bit - st_bit + 1; | |
563dbb26 RA |
442 | mask = (1 << nr_bits) - 1; |
443 | l = (l >> st_bit) & mask; | |
4b613e9b RA |
444 | if (!max) |
445 | max = mask; | |
446 | invalid = l > max; | |
35ac051e TL |
447 | if (shift) |
448 | l = (shift << l); | |
449 | if (noval && (l == 0)) | |
450 | return 0; | |
451 | if (!raw) { | |
563dbb26 RA |
452 | /* DTS tick format for timings in ns */ |
453 | unsigned int time_ns; | |
454 | unsigned int time_ns_min = 0; | |
35ac051e | 455 | |
563dbb26 | 456 | if (l) |
7f2e8c58 RA |
457 | time_ns_min = gpmc_clk_ticks_to_ns(l - 1, cs, cd) + 1; |
458 | time_ns = gpmc_clk_ticks_to_ns(l, cs, cd); | |
95c278b2 | 459 | pr_info("gpmc,%s = <%u>; /* %u ns - %u ns; %i ticks%s*/\n", |
4b613e9b RA |
460 | name, time_ns, time_ns_min, time_ns, l, |
461 | invalid ? "; invalid " : " "); | |
35ac051e | 462 | } else { |
563dbb26 | 463 | /* raw format */ |
95c278b2 | 464 | pr_info("gpmc,%s = <%u>;%s\n", name, l, |
4b613e9b | 465 | invalid ? " /* invalid */" : ""); |
35ac051e TL |
466 | } |
467 | ||
468 | return l; | |
469 | } | |
470 | ||
471 | #define GPMC_PRINT_CONFIG(cs, config) \ | |
472 | pr_info("cs%i %s: 0x%08x\n", cs, #config, \ | |
473 | gpmc_cs_read_reg(cs, config)) | |
474 | #define GPMC_GET_RAW(reg, st, end, field) \ | |
4b613e9b RA |
475 | get_gpmc_timing_reg(cs, (reg), (st), (end), 0, field, GPMC_CD_FCLK, 0, 1, 0) |
476 | #define GPMC_GET_RAW_MAX(reg, st, end, max, field) \ | |
477 | get_gpmc_timing_reg(cs, (reg), (st), (end), (max), field, GPMC_CD_FCLK, 0, 1, 0) | |
35ac051e | 478 | #define GPMC_GET_RAW_BOOL(reg, st, end, field) \ |
4b613e9b RA |
479 | get_gpmc_timing_reg(cs, (reg), (st), (end), 0, field, GPMC_CD_FCLK, 0, 1, 1) |
480 | #define GPMC_GET_RAW_SHIFT_MAX(reg, st, end, shift, max, field) \ | |
481 | get_gpmc_timing_reg(cs, (reg), (st), (end), (max), field, GPMC_CD_FCLK, (shift), 1, 1) | |
35ac051e | 482 | #define GPMC_GET_TICKS(reg, st, end, field) \ |
4b613e9b | 483 | get_gpmc_timing_reg(cs, (reg), (st), (end), 0, field, GPMC_CD_FCLK, 0, 0, 0) |
7f2e8c58 | 484 | #define GPMC_GET_TICKS_CD(reg, st, end, field, cd) \ |
4b613e9b RA |
485 | get_gpmc_timing_reg(cs, (reg), (st), (end), 0, field, (cd), 0, 0, 0) |
486 | #define GPMC_GET_TICKS_CD_MAX(reg, st, end, max, field, cd) \ | |
487 | get_gpmc_timing_reg(cs, (reg), (st), (end), (max), field, (cd), 0, 0, 0) | |
35ac051e TL |
488 | |
489 | static void gpmc_show_regs(int cs, const char *desc) | |
490 | { | |
491 | pr_info("gpmc cs%i %s:\n", cs, desc); | |
492 | GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG1); | |
493 | GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG2); | |
494 | GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG3); | |
495 | GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG4); | |
496 | GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG5); | |
497 | GPMC_PRINT_CONFIG(cs, GPMC_CS_CONFIG6); | |
498 | } | |
499 | ||
500 | /* | |
501 | * Note that gpmc,wait-pin handing wrongly assumes bit 8 is available, | |
502 | * see commit c9fb809. | |
503 | */ | |
504 | static void gpmc_cs_show_timings(int cs, const char *desc) | |
505 | { | |
506 | gpmc_show_regs(cs, desc); | |
507 | ||
508 | pr_info("gpmc cs%i access configuration:\n", cs); | |
509 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 4, 4, "time-para-granularity"); | |
510 | GPMC_GET_RAW(GPMC_CS_CONFIG1, 8, 9, "mux-add-data"); | |
aff523fb | 511 | GPMC_GET_RAW_SHIFT_MAX(GPMC_CS_CONFIG1, 12, 13, 1, |
cdd1aeae | 512 | GPMC_CONFIG1_DEVICESIZE_MAX, "device-width"); |
35ac051e TL |
513 | GPMC_GET_RAW(GPMC_CS_CONFIG1, 16, 17, "wait-pin"); |
514 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 21, 21, "wait-on-write"); | |
515 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 22, 22, "wait-on-read"); | |
4b613e9b RA |
516 | GPMC_GET_RAW_SHIFT_MAX(GPMC_CS_CONFIG1, 23, 24, 4, |
517 | GPMC_CONFIG1_ATTACHEDDEVICEPAGELENGTH_MAX, | |
518 | "burst-length"); | |
35ac051e TL |
519 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 27, 27, "sync-write"); |
520 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 28, 28, "burst-write"); | |
521 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 29, 29, "gpmc,sync-read"); | |
522 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 30, 30, "burst-read"); | |
523 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG1, 31, 31, "burst-wrap"); | |
524 | ||
525 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG2, 7, 7, "cs-extra-delay"); | |
526 | ||
527 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG3, 7, 7, "adv-extra-delay"); | |
528 | ||
529 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG4, 23, 23, "we-extra-delay"); | |
530 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG4, 7, 7, "oe-extra-delay"); | |
531 | ||
532 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG6, 7, 7, "cycle2cycle-samecsen"); | |
533 | GPMC_GET_RAW_BOOL(GPMC_CS_CONFIG6, 6, 6, "cycle2cycle-diffcsen"); | |
534 | ||
535 | pr_info("gpmc cs%i timings configuration:\n", cs); | |
536 | GPMC_GET_TICKS(GPMC_CS_CONFIG2, 0, 3, "cs-on-ns"); | |
537 | GPMC_GET_TICKS(GPMC_CS_CONFIG2, 8, 12, "cs-rd-off-ns"); | |
538 | GPMC_GET_TICKS(GPMC_CS_CONFIG2, 16, 20, "cs-wr-off-ns"); | |
539 | ||
540 | GPMC_GET_TICKS(GPMC_CS_CONFIG3, 0, 3, "adv-on-ns"); | |
541 | GPMC_GET_TICKS(GPMC_CS_CONFIG3, 8, 12, "adv-rd-off-ns"); | |
542 | GPMC_GET_TICKS(GPMC_CS_CONFIG3, 16, 20, "adv-wr-off-ns"); | |
2c92c04b NA |
543 | if (gpmc_capability & GPMC_HAS_MUX_AAD) { |
544 | GPMC_GET_TICKS(GPMC_CS_CONFIG3, 4, 6, "adv-aad-mux-on-ns"); | |
545 | GPMC_GET_TICKS(GPMC_CS_CONFIG3, 24, 26, | |
546 | "adv-aad-mux-rd-off-ns"); | |
547 | GPMC_GET_TICKS(GPMC_CS_CONFIG3, 28, 30, | |
548 | "adv-aad-mux-wr-off-ns"); | |
549 | } | |
35ac051e TL |
550 | |
551 | GPMC_GET_TICKS(GPMC_CS_CONFIG4, 0, 3, "oe-on-ns"); | |
552 | GPMC_GET_TICKS(GPMC_CS_CONFIG4, 8, 12, "oe-off-ns"); | |
2c92c04b NA |
553 | if (gpmc_capability & GPMC_HAS_MUX_AAD) { |
554 | GPMC_GET_TICKS(GPMC_CS_CONFIG4, 4, 6, "oe-aad-mux-on-ns"); | |
555 | GPMC_GET_TICKS(GPMC_CS_CONFIG4, 13, 15, "oe-aad-mux-off-ns"); | |
556 | } | |
35ac051e TL |
557 | GPMC_GET_TICKS(GPMC_CS_CONFIG4, 16, 19, "we-on-ns"); |
558 | GPMC_GET_TICKS(GPMC_CS_CONFIG4, 24, 28, "we-off-ns"); | |
559 | ||
560 | GPMC_GET_TICKS(GPMC_CS_CONFIG5, 0, 4, "rd-cycle-ns"); | |
561 | GPMC_GET_TICKS(GPMC_CS_CONFIG5, 8, 12, "wr-cycle-ns"); | |
562 | GPMC_GET_TICKS(GPMC_CS_CONFIG5, 16, 20, "access-ns"); | |
563 | ||
564 | GPMC_GET_TICKS(GPMC_CS_CONFIG5, 24, 27, "page-burst-access-ns"); | |
565 | ||
566 | GPMC_GET_TICKS(GPMC_CS_CONFIG6, 0, 3, "bus-turnaround-ns"); | |
567 | GPMC_GET_TICKS(GPMC_CS_CONFIG6, 8, 11, "cycle2cycle-delay-ns"); | |
568 | ||
4b613e9b RA |
569 | GPMC_GET_TICKS_CD_MAX(GPMC_CS_CONFIG1, 18, 19, |
570 | GPMC_CONFIG1_WAITMONITORINGTIME_MAX, | |
571 | "wait-monitoring-ns", GPMC_CD_CLK); | |
572 | GPMC_GET_TICKS_CD_MAX(GPMC_CS_CONFIG1, 25, 26, | |
573 | GPMC_CONFIG1_CLKACTIVATIONTIME_MAX, | |
574 | "clk-activation-ns", GPMC_CD_FCLK); | |
35ac051e TL |
575 | |
576 | GPMC_GET_TICKS(GPMC_CS_CONFIG6, 16, 19, "wr-data-mux-bus-ns"); | |
577 | GPMC_GET_TICKS(GPMC_CS_CONFIG6, 24, 28, "wr-access-ns"); | |
578 | } | |
4bbbc1ad | 579 | #else |
35ac051e TL |
580 | static inline void gpmc_cs_show_timings(int cs, const char *desc) |
581 | { | |
582 | } | |
4bbbc1ad | 583 | #endif |
35ac051e | 584 | |
7f2e8c58 RA |
585 | /** |
586 | * set_gpmc_timing_reg - set a single timing parameter for Chip Select Region. | |
587 | * Caller is expected to have initialized CONFIG1 GPMCFCLKDIVIDER | |
588 | * prior to calling this function with @cd equal to GPMC_CD_CLK. | |
589 | * | |
590 | * @cs: Chip Select Region. | |
591 | * @reg: GPMC_CS_CONFIGn register offset. | |
592 | * @st_bit: Start Bit | |
593 | * @end_bit: End Bit. Must be >= @st_bit. | |
4b613e9b RA |
594 | * @max: Maximum parameter value. |
595 | * If 0, maximum is as high as @st_bit and @end_bit allow. | |
7f2e8c58 RA |
596 | * @time: Timing parameter in ns. |
597 | * @cd: Timing parameter clock domain. | |
598 | * @name: Timing parameter name. | |
599 | * @return: 0 on success, -1 on error. | |
600 | */ | |
4b613e9b | 601 | static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit, int max, |
7f2e8c58 | 602 | int time, enum gpmc_clk_domain cd, const char *name) |
4bbbc1ad JY |
603 | { |
604 | u32 l; | |
605 | int ticks, mask, nr_bits; | |
606 | ||
607 | if (time == 0) | |
608 | ticks = 0; | |
609 | else | |
7f2e8c58 | 610 | ticks = gpmc_ns_to_clk_ticks(time, cs, cd); |
4bbbc1ad | 611 | nr_bits = end_bit - st_bit + 1; |
80323742 RQ |
612 | mask = (1 << nr_bits) - 1; |
613 | ||
4b613e9b RA |
614 | if (!max) |
615 | max = mask; | |
616 | ||
617 | if (ticks > max) { | |
7f2e8c58 | 618 | pr_err("%s: GPMC CS%d: %s %d ns, %d ticks > %d ticks\n", |
4b613e9b | 619 | __func__, cs, name, time, ticks, max); |
80323742 | 620 | |
4bbbc1ad | 621 | return -1; |
1c22cc13 | 622 | } |
4bbbc1ad | 623 | |
4bbbc1ad | 624 | l = gpmc_cs_read_reg(cs, reg); |
63aa945b | 625 | #ifdef CONFIG_OMAP_GPMC_DEBUG |
cdd1aeae KK |
626 | pr_info("GPMC CS%d: %-17s: %3d ticks, %3lu ns (was %3i ticks) %3d ns\n", |
627 | cs, name, ticks, gpmc_get_clk_period(cs, cd) * ticks / 1000, | |
1c22cc13 | 628 | (l >> st_bit) & mask, time); |
4bbbc1ad JY |
629 | #endif |
630 | l &= ~(mask << st_bit); | |
631 | l |= ticks << st_bit; | |
632 | gpmc_cs_write_reg(cs, reg, l); | |
633 | ||
634 | return 0; | |
635 | } | |
636 | ||
4b613e9b RA |
637 | #define GPMC_SET_ONE_CD_MAX(reg, st, end, max, field, cd) \ |
638 | if (set_gpmc_timing_reg(cs, (reg), (st), (end), (max), \ | |
639 | t->field, (cd), #field) < 0) \ | |
4bbbc1ad | 640 | return -1 |
4bbbc1ad | 641 | |
7f2e8c58 | 642 | #define GPMC_SET_ONE(reg, st, end, field) \ |
4b613e9b | 643 | GPMC_SET_ONE_CD_MAX(reg, st, end, 0, field, GPMC_CD_FCLK) |
7f2e8c58 | 644 | |
2e676901 RA |
645 | /** |
646 | * gpmc_calc_waitmonitoring_divider - calculate proper GPMCFCLKDIVIDER based on WAITMONITORINGTIME | |
647 | * WAITMONITORINGTIME will be _at least_ as long as desired, i.e. | |
648 | * read --> don't sample bus too early | |
649 | * write --> data is longer on bus | |
650 | * | |
651 | * Formula: | |
652 | * gpmc_clk_div + 1 = ceil(ceil(waitmonitoringtime_ns / gpmc_fclk_ns) | |
653 | * / waitmonitoring_ticks) | |
654 | * WAITMONITORINGTIME resulting in 0 or 1 tick with div = 1 are caught by | |
655 | * div <= 0 check. | |
656 | * | |
657 | * @wait_monitoring: WAITMONITORINGTIME in ns. | |
658 | * @return: -1 on failure to scale, else proper divider > 0. | |
659 | */ | |
660 | static int gpmc_calc_waitmonitoring_divider(unsigned int wait_monitoring) | |
661 | { | |
2e676901 RA |
662 | int div = gpmc_ns_to_ticks(wait_monitoring); |
663 | ||
664 | div += GPMC_CONFIG1_WAITMONITORINGTIME_MAX - 1; | |
665 | div /= GPMC_CONFIG1_WAITMONITORINGTIME_MAX; | |
666 | ||
667 | if (div > 4) | |
668 | return -1; | |
669 | if (div <= 0) | |
670 | div = 1; | |
671 | ||
672 | return div; | |
2e676901 RA |
673 | } |
674 | ||
675 | /** | |
676 | * gpmc_calc_divider - calculate GPMC_FCLK divider for sync_clk GPMC_CLK period. | |
677 | * @sync_clk: GPMC_CLK period in ps. | |
678 | * @return: Returns at least 1 if GPMC_FCLK can be divided to GPMC_CLK. | |
679 | * Else, returns -1. | |
680 | */ | |
1b47ca1a | 681 | int gpmc_calc_divider(unsigned int sync_clk) |
4bbbc1ad | 682 | { |
2e676901 | 683 | int div = gpmc_ps_to_ticks(sync_clk); |
4bbbc1ad | 684 | |
4bbbc1ad JY |
685 | if (div > 4) |
686 | return -1; | |
1c22cc13 | 687 | if (div <= 0) |
4bbbc1ad JY |
688 | div = 1; |
689 | ||
690 | return div; | |
691 | } | |
692 | ||
2e676901 RA |
693 | /** |
694 | * gpmc_cs_set_timings - program timing parameters for Chip Select Region. | |
695 | * @cs: Chip Select Region. | |
696 | * @t: GPMC timing parameters. | |
697 | * @s: GPMC timing settings. | |
698 | * @return: 0 on success, -1 on error. | |
699 | */ | |
700 | int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t, | |
701 | const struct gpmc_settings *s) | |
4bbbc1ad JY |
702 | { |
703 | int div; | |
704 | u32 l; | |
705 | ||
1b47ca1a | 706 | div = gpmc_calc_divider(t->sync_clk); |
4bbbc1ad | 707 | if (div < 0) |
a032d33b | 708 | return div; |
4bbbc1ad | 709 | |
2e676901 RA |
710 | /* |
711 | * See if we need to change the divider for waitmonitoringtime. | |
712 | * | |
713 | * Calculate GPMCFCLKDIVIDER independent of gpmc,sync-clk-ps in DT for | |
714 | * pure asynchronous accesses, i.e. both read and write asynchronous. | |
715 | * However, only do so if WAITMONITORINGTIME is actually used, i.e. | |
716 | * either WAITREADMONITORING or WAITWRITEMONITORING is set. | |
717 | * | |
718 | * This statement must not change div to scale async WAITMONITORINGTIME | |
719 | * to protect mixed synchronous and asynchronous accesses. | |
720 | * | |
721 | * We raise an error later if WAITMONITORINGTIME does not fit. | |
722 | */ | |
723 | if (!s->sync_read && !s->sync_write && | |
724 | (s->wait_on_read || s->wait_on_write) | |
725 | ) { | |
2e676901 RA |
726 | div = gpmc_calc_waitmonitoring_divider(t->wait_monitoring); |
727 | if (div < 0) { | |
728 | pr_err("%s: waitmonitoringtime %3d ns too large for greatest gpmcfclkdivider.\n", | |
729 | __func__, | |
730 | t->wait_monitoring | |
731 | ); | |
732 | return -1; | |
733 | } | |
734 | } | |
735 | ||
4bbbc1ad JY |
736 | GPMC_SET_ONE(GPMC_CS_CONFIG2, 0, 3, cs_on); |
737 | GPMC_SET_ONE(GPMC_CS_CONFIG2, 8, 12, cs_rd_off); | |
738 | GPMC_SET_ONE(GPMC_CS_CONFIG2, 16, 20, cs_wr_off); | |
739 | ||
740 | GPMC_SET_ONE(GPMC_CS_CONFIG3, 0, 3, adv_on); | |
741 | GPMC_SET_ONE(GPMC_CS_CONFIG3, 8, 12, adv_rd_off); | |
742 | GPMC_SET_ONE(GPMC_CS_CONFIG3, 16, 20, adv_wr_off); | |
2c92c04b NA |
743 | if (gpmc_capability & GPMC_HAS_MUX_AAD) { |
744 | GPMC_SET_ONE(GPMC_CS_CONFIG3, 4, 6, adv_aad_mux_on); | |
745 | GPMC_SET_ONE(GPMC_CS_CONFIG3, 24, 26, adv_aad_mux_rd_off); | |
746 | GPMC_SET_ONE(GPMC_CS_CONFIG3, 28, 30, adv_aad_mux_wr_off); | |
747 | } | |
4bbbc1ad JY |
748 | |
749 | GPMC_SET_ONE(GPMC_CS_CONFIG4, 0, 3, oe_on); | |
750 | GPMC_SET_ONE(GPMC_CS_CONFIG4, 8, 12, oe_off); | |
2c92c04b NA |
751 | if (gpmc_capability & GPMC_HAS_MUX_AAD) { |
752 | GPMC_SET_ONE(GPMC_CS_CONFIG4, 4, 6, oe_aad_mux_on); | |
753 | GPMC_SET_ONE(GPMC_CS_CONFIG4, 13, 15, oe_aad_mux_off); | |
754 | } | |
4bbbc1ad JY |
755 | GPMC_SET_ONE(GPMC_CS_CONFIG4, 16, 19, we_on); |
756 | GPMC_SET_ONE(GPMC_CS_CONFIG4, 24, 28, we_off); | |
757 | ||
758 | GPMC_SET_ONE(GPMC_CS_CONFIG5, 0, 4, rd_cycle); | |
759 | GPMC_SET_ONE(GPMC_CS_CONFIG5, 8, 12, wr_cycle); | |
760 | GPMC_SET_ONE(GPMC_CS_CONFIG5, 16, 20, access); | |
761 | ||
762 | GPMC_SET_ONE(GPMC_CS_CONFIG5, 24, 27, page_burst_access); | |
763 | ||
559d94b0 AM |
764 | GPMC_SET_ONE(GPMC_CS_CONFIG6, 0, 3, bus_turnaround); |
765 | GPMC_SET_ONE(GPMC_CS_CONFIG6, 8, 11, cycle2cycle_delay); | |
766 | ||
da496873 | 767 | if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS) |
cc26b3b0 | 768 | GPMC_SET_ONE(GPMC_CS_CONFIG6, 16, 19, wr_data_mux_bus); |
da496873 | 769 | if (gpmc_capability & GPMC_HAS_WR_ACCESS) |
cc26b3b0 | 770 | GPMC_SET_ONE(GPMC_CS_CONFIG6, 24, 28, wr_access); |
cc26b3b0 | 771 | |
1c22cc13 | 772 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1); |
7f2e8c58 RA |
773 | l &= ~0x03; |
774 | l |= (div - 1); | |
775 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, l); | |
776 | ||
4b613e9b RA |
777 | GPMC_SET_ONE_CD_MAX(GPMC_CS_CONFIG1, 18, 19, |
778 | GPMC_CONFIG1_WAITMONITORINGTIME_MAX, | |
779 | wait_monitoring, GPMC_CD_CLK); | |
780 | GPMC_SET_ONE_CD_MAX(GPMC_CS_CONFIG1, 25, 26, | |
781 | GPMC_CONFIG1_CLKACTIVATIONTIME_MAX, | |
782 | clk_activation, GPMC_CD_FCLK); | |
7f2e8c58 | 783 | |
63aa945b | 784 | #ifdef CONFIG_OMAP_GPMC_DEBUG |
f585070b RA |
785 | pr_info("GPMC CS%d CLK period is %lu ns (div %d)\n", |
786 | cs, (div * gpmc_get_fclk_period()) / 1000, div); | |
4bbbc1ad | 787 | #endif |
4bbbc1ad | 788 | |
559d94b0 | 789 | gpmc_cs_bool_timings(cs, &t->bool_timings); |
35ac051e | 790 | gpmc_cs_show_timings(cs, "after gpmc_cs_set_timings"); |
559d94b0 | 791 | |
4bbbc1ad JY |
792 | return 0; |
793 | } | |
794 | ||
4cf27d2e | 795 | static int gpmc_cs_set_memconf(int cs, u32 base, u32 size) |
f37e4580 ID |
796 | { |
797 | u32 l; | |
798 | u32 mask; | |
799 | ||
c71f8e9b JH |
800 | /* |
801 | * Ensure that base address is aligned on a | |
802 | * boundary equal to or greater than size. | |
803 | */ | |
804 | if (base & (size - 1)) | |
805 | return -EINVAL; | |
806 | ||
9c4f757e | 807 | base >>= GPMC_CHUNK_SHIFT; |
f37e4580 | 808 | mask = (1 << GPMC_SECTION_SHIFT) - size; |
9c4f757e SP |
809 | mask >>= GPMC_CHUNK_SHIFT; |
810 | mask <<= GPMC_CONFIG7_MASKADDRESS_OFFSET; | |
811 | ||
f37e4580 | 812 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); |
9c4f757e SP |
813 | l &= ~GPMC_CONFIG7_MASK; |
814 | l |= base & GPMC_CONFIG7_BASEADDRESS_MASK; | |
815 | l |= mask & GPMC_CONFIG7_MASKADDRESS_MASK; | |
a2d3e7ba | 816 | l |= GPMC_CONFIG7_CSVALID; |
f37e4580 | 817 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l); |
c71f8e9b JH |
818 | |
819 | return 0; | |
f37e4580 ID |
820 | } |
821 | ||
4cf27d2e RQ |
822 | static void gpmc_cs_enable_mem(int cs) |
823 | { | |
824 | u32 l; | |
825 | ||
826 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); | |
827 | l |= GPMC_CONFIG7_CSVALID; | |
828 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l); | |
829 | } | |
830 | ||
f37e4580 ID |
831 | static void gpmc_cs_disable_mem(int cs) |
832 | { | |
833 | u32 l; | |
834 | ||
835 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); | |
a2d3e7ba | 836 | l &= ~GPMC_CONFIG7_CSVALID; |
f37e4580 ID |
837 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l); |
838 | } | |
839 | ||
840 | static void gpmc_cs_get_memconf(int cs, u32 *base, u32 *size) | |
841 | { | |
842 | u32 l; | |
843 | u32 mask; | |
844 | ||
845 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); | |
846 | *base = (l & 0x3f) << GPMC_CHUNK_SHIFT; | |
847 | mask = (l >> 8) & 0x0f; | |
848 | *size = (1 << GPMC_SECTION_SHIFT) - (mask << GPMC_CHUNK_SHIFT); | |
849 | } | |
850 | ||
851 | static int gpmc_cs_mem_enabled(int cs) | |
852 | { | |
853 | u32 l; | |
854 | ||
855 | l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7); | |
a2d3e7ba | 856 | return l & GPMC_CONFIG7_CSVALID; |
f37e4580 ID |
857 | } |
858 | ||
f5d8edaf | 859 | static void gpmc_cs_set_reserved(int cs, int reserved) |
4bbbc1ad | 860 | { |
9ed7a776 TL |
861 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; |
862 | ||
863 | gpmc->flags |= GPMC_CS_RESERVED; | |
f37e4580 ID |
864 | } |
865 | ||
ae9d908a | 866 | static bool gpmc_cs_reserved(int cs) |
f37e4580 | 867 | { |
9ed7a776 TL |
868 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; |
869 | ||
870 | return gpmc->flags & GPMC_CS_RESERVED; | |
871 | } | |
872 | ||
873 | static void gpmc_cs_set_name(int cs, const char *name) | |
874 | { | |
875 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; | |
876 | ||
877 | gpmc->name = name; | |
878 | } | |
879 | ||
2e25b0ec | 880 | static const char *gpmc_cs_get_name(int cs) |
9ed7a776 TL |
881 | { |
882 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; | |
883 | ||
884 | return gpmc->name; | |
f37e4580 ID |
885 | } |
886 | ||
887 | static unsigned long gpmc_mem_align(unsigned long size) | |
888 | { | |
889 | int order; | |
890 | ||
891 | size = (size - 1) >> (GPMC_CHUNK_SHIFT - 1); | |
892 | order = GPMC_CHUNK_SHIFT - 1; | |
893 | do { | |
894 | size >>= 1; | |
895 | order++; | |
896 | } while (size); | |
897 | size = 1 << order; | |
898 | return size; | |
899 | } | |
900 | ||
901 | static int gpmc_cs_insert_mem(int cs, unsigned long base, unsigned long size) | |
902 | { | |
9ed7a776 TL |
903 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; |
904 | struct resource *res = &gpmc->mem; | |
f37e4580 ID |
905 | int r; |
906 | ||
907 | size = gpmc_mem_align(size); | |
908 | spin_lock(&gpmc_mem_lock); | |
909 | res->start = base; | |
910 | res->end = base + size - 1; | |
911 | r = request_resource(&gpmc_mem_root, res); | |
912 | spin_unlock(&gpmc_mem_lock); | |
913 | ||
914 | return r; | |
915 | } | |
916 | ||
da496873 AM |
917 | static int gpmc_cs_delete_mem(int cs) |
918 | { | |
9ed7a776 TL |
919 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; |
920 | struct resource *res = &gpmc->mem; | |
da496873 AM |
921 | int r; |
922 | ||
923 | spin_lock(&gpmc_mem_lock); | |
efe80723 | 924 | r = release_resource(res); |
da496873 AM |
925 | res->start = 0; |
926 | res->end = 0; | |
927 | spin_unlock(&gpmc_mem_lock); | |
928 | ||
929 | return r; | |
930 | } | |
931 | ||
cdd6928c JH |
932 | /** |
933 | * gpmc_cs_remap - remaps a chip-select physical base address | |
934 | * @cs: chip-select to remap | |
935 | * @base: physical base address to re-map chip-select to | |
936 | * | |
937 | * Re-maps a chip-select to a new physical base address specified by | |
938 | * "base". Returns 0 on success and appropriate negative error code | |
939 | * on failure. | |
940 | */ | |
941 | static int gpmc_cs_remap(int cs, u32 base) | |
942 | { | |
943 | int ret; | |
944 | u32 old_base, size; | |
945 | ||
f34f3716 GP |
946 | if (cs > gpmc_cs_num) { |
947 | pr_err("%s: requested chip-select is disabled\n", __func__); | |
cdd6928c | 948 | return -ENODEV; |
f34f3716 | 949 | } |
fb677ef7 TL |
950 | |
951 | /* | |
952 | * Make sure we ignore any device offsets from the GPMC partition | |
953 | * allocated for the chip select and that the new base confirms | |
954 | * to the GPMC 16MB minimum granularity. | |
1a1e7580 | 955 | */ |
fb677ef7 TL |
956 | base &= ~(SZ_16M - 1); |
957 | ||
cdd6928c JH |
958 | gpmc_cs_get_memconf(cs, &old_base, &size); |
959 | if (base == old_base) | |
960 | return 0; | |
4cf27d2e | 961 | |
cdd6928c JH |
962 | ret = gpmc_cs_delete_mem(cs); |
963 | if (ret < 0) | |
964 | return ret; | |
4cf27d2e | 965 | |
cdd6928c | 966 | ret = gpmc_cs_insert_mem(cs, base, size); |
c71f8e9b JH |
967 | if (ret < 0) |
968 | return ret; | |
cdd6928c | 969 | |
4cf27d2e RQ |
970 | ret = gpmc_cs_set_memconf(cs, base, size); |
971 | ||
972 | return ret; | |
cdd6928c JH |
973 | } |
974 | ||
f37e4580 ID |
975 | int gpmc_cs_request(int cs, unsigned long size, unsigned long *base) |
976 | { | |
9ed7a776 TL |
977 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; |
978 | struct resource *res = &gpmc->mem; | |
f37e4580 ID |
979 | int r = -1; |
980 | ||
f34f3716 GP |
981 | if (cs > gpmc_cs_num) { |
982 | pr_err("%s: requested chip-select is disabled\n", __func__); | |
f37e4580 | 983 | return -ENODEV; |
f34f3716 | 984 | } |
f37e4580 ID |
985 | size = gpmc_mem_align(size); |
986 | if (size > (1 << GPMC_SECTION_SHIFT)) | |
987 | return -ENOMEM; | |
988 | ||
989 | spin_lock(&gpmc_mem_lock); | |
990 | if (gpmc_cs_reserved(cs)) { | |
991 | r = -EBUSY; | |
992 | goto out; | |
993 | } | |
994 | if (gpmc_cs_mem_enabled(cs)) | |
995 | r = adjust_resource(res, res->start & ~(size - 1), size); | |
996 | if (r < 0) | |
997 | r = allocate_resource(&gpmc_mem_root, res, size, 0, ~0, | |
998 | size, NULL, NULL); | |
999 | if (r < 0) | |
1000 | goto out; | |
1001 | ||
4cf27d2e RQ |
1002 | /* Disable CS while changing base address and size mask */ |
1003 | gpmc_cs_disable_mem(cs); | |
1004 | ||
1005 | r = gpmc_cs_set_memconf(cs, res->start, resource_size(res)); | |
c71f8e9b JH |
1006 | if (r < 0) { |
1007 | release_resource(res); | |
1008 | goto out; | |
1009 | } | |
1010 | ||
4cf27d2e RQ |
1011 | /* Enable CS */ |
1012 | gpmc_cs_enable_mem(cs); | |
f37e4580 ID |
1013 | *base = res->start; |
1014 | gpmc_cs_set_reserved(cs, 1); | |
1015 | out: | |
1016 | spin_unlock(&gpmc_mem_lock); | |
1017 | return r; | |
1018 | } | |
fd1dc87d | 1019 | EXPORT_SYMBOL(gpmc_cs_request); |
f37e4580 ID |
1020 | |
1021 | void gpmc_cs_free(int cs) | |
1022 | { | |
9ed7a776 TL |
1023 | struct gpmc_cs_data *gpmc = &gpmc_cs[cs]; |
1024 | struct resource *res = &gpmc->mem; | |
efe80723 | 1025 | |
f37e4580 | 1026 | spin_lock(&gpmc_mem_lock); |
f34f3716 | 1027 | if (cs >= gpmc_cs_num || cs < 0 || !gpmc_cs_reserved(cs)) { |
f37e4580 ID |
1028 | printk(KERN_ERR "Trying to free non-reserved GPMC CS%d\n", cs); |
1029 | BUG(); | |
1030 | spin_unlock(&gpmc_mem_lock); | |
1031 | return; | |
1032 | } | |
1033 | gpmc_cs_disable_mem(cs); | |
efe80723 TL |
1034 | if (res->flags) |
1035 | release_resource(res); | |
f37e4580 ID |
1036 | gpmc_cs_set_reserved(cs, 0); |
1037 | spin_unlock(&gpmc_mem_lock); | |
1038 | } | |
fd1dc87d | 1039 | EXPORT_SYMBOL(gpmc_cs_free); |
f37e4580 | 1040 | |
948d38e7 | 1041 | /** |
3a544354 | 1042 | * gpmc_configure - write request to configure gpmc |
948d38e7 SG |
1043 | * @cmd: command type |
1044 | * @wval: value to write | |
1045 | * @return status of the operation | |
1046 | */ | |
3a544354 | 1047 | int gpmc_configure(int cmd, int wval) |
948d38e7 | 1048 | { |
3a544354 | 1049 | u32 regval; |
948d38e7 SG |
1050 | |
1051 | switch (cmd) { | |
948d38e7 SG |
1052 | case GPMC_CONFIG_WP: |
1053 | regval = gpmc_read_reg(GPMC_CONFIG); | |
1054 | if (wval) | |
1055 | regval &= ~GPMC_CONFIG_WRITEPROTECT; /* WP is ON */ | |
1056 | else | |
1057 | regval |= GPMC_CONFIG_WRITEPROTECT; /* WP is OFF */ | |
1058 | gpmc_write_reg(GPMC_CONFIG, regval); | |
1059 | break; | |
1060 | ||
948d38e7 | 1061 | default: |
3a544354 JH |
1062 | pr_err("%s: command not supported\n", __func__); |
1063 | return -EINVAL; | |
948d38e7 SG |
1064 | } |
1065 | ||
3a544354 | 1066 | return 0; |
948d38e7 | 1067 | } |
3a544354 | 1068 | EXPORT_SYMBOL(gpmc_configure); |
948d38e7 | 1069 | |
a622c641 LM |
1070 | static bool gpmc_nand_writebuffer_empty(void) |
1071 | { | |
1072 | if (gpmc_read_reg(GPMC_STATUS) & GPMC_STATUS_EMPTYWRITEBUFFERSTATUS) | |
1073 | return true; | |
1074 | ||
1075 | return false; | |
1076 | } | |
1077 | ||
1078 | static struct gpmc_nand_ops nand_ops = { | |
1079 | .nand_writebuffer_empty = gpmc_nand_writebuffer_empty, | |
1080 | }; | |
1081 | ||
1082 | /** | |
1083 | * gpmc_omap_get_nand_ops - Get the GPMC NAND interface | |
80c4f5a8 | 1084 | * @reg: the GPMC NAND register map exclusive for NAND use. |
a622c641 LM |
1085 | * @cs: GPMC chip select number on which the NAND sits. The |
1086 | * register map returned will be specific to this chip select. | |
1087 | * | |
1088 | * Returns NULL on error e.g. invalid cs. | |
1089 | */ | |
1090 | struct gpmc_nand_ops *gpmc_omap_get_nand_ops(struct gpmc_nand_regs *reg, int cs) | |
52bd138d | 1091 | { |
2fdf0c98 AM |
1092 | int i; |
1093 | ||
a622c641 LM |
1094 | if (cs >= gpmc_cs_num) |
1095 | return NULL; | |
1096 | ||
52bd138d AM |
1097 | reg->gpmc_nand_command = gpmc_base + GPMC_CS0_OFFSET + |
1098 | GPMC_CS_NAND_COMMAND + GPMC_CS_SIZE * cs; | |
1099 | reg->gpmc_nand_address = gpmc_base + GPMC_CS0_OFFSET + | |
1100 | GPMC_CS_NAND_ADDRESS + GPMC_CS_SIZE * cs; | |
1101 | reg->gpmc_nand_data = gpmc_base + GPMC_CS0_OFFSET + | |
1102 | GPMC_CS_NAND_DATA + GPMC_CS_SIZE * cs; | |
1103 | reg->gpmc_prefetch_config1 = gpmc_base + GPMC_PREFETCH_CONFIG1; | |
1104 | reg->gpmc_prefetch_config2 = gpmc_base + GPMC_PREFETCH_CONFIG2; | |
1105 | reg->gpmc_prefetch_control = gpmc_base + GPMC_PREFETCH_CONTROL; | |
1106 | reg->gpmc_prefetch_status = gpmc_base + GPMC_PREFETCH_STATUS; | |
1107 | reg->gpmc_ecc_config = gpmc_base + GPMC_ECC_CONFIG; | |
1108 | reg->gpmc_ecc_control = gpmc_base + GPMC_ECC_CONTROL; | |
1109 | reg->gpmc_ecc_size_config = gpmc_base + GPMC_ECC_SIZE_CONFIG; | |
1110 | reg->gpmc_ecc1_result = gpmc_base + GPMC_ECC1_RESULT; | |
2fdf0c98 AM |
1111 | |
1112 | for (i = 0; i < GPMC_BCH_NUM_REMAINDER; i++) { | |
1113 | reg->gpmc_bch_result0[i] = gpmc_base + GPMC_ECC_BCH_RESULT_0 + | |
1114 | GPMC_BCH_SIZE * i; | |
1115 | reg->gpmc_bch_result1[i] = gpmc_base + GPMC_ECC_BCH_RESULT_1 + | |
1116 | GPMC_BCH_SIZE * i; | |
1117 | reg->gpmc_bch_result2[i] = gpmc_base + GPMC_ECC_BCH_RESULT_2 + | |
1118 | GPMC_BCH_SIZE * i; | |
1119 | reg->gpmc_bch_result3[i] = gpmc_base + GPMC_ECC_BCH_RESULT_3 + | |
1120 | GPMC_BCH_SIZE * i; | |
27c9fd60 | 1121 | reg->gpmc_bch_result4[i] = gpmc_base + GPMC_ECC_BCH_RESULT_4 + |
1122 | i * GPMC_BCH_SIZE; | |
1123 | reg->gpmc_bch_result5[i] = gpmc_base + GPMC_ECC_BCH_RESULT_5 + | |
1124 | i * GPMC_BCH_SIZE; | |
1125 | reg->gpmc_bch_result6[i] = gpmc_base + GPMC_ECC_BCH_RESULT_6 + | |
1126 | i * GPMC_BCH_SIZE; | |
2fdf0c98 | 1127 | } |
f47fcad6 RQ |
1128 | |
1129 | return &nand_ops; | |
1130 | } | |
1131 | EXPORT_SYMBOL_GPL(gpmc_omap_get_nand_ops); | |
1132 | ||
a758f50f LM |
1133 | static void gpmc_omap_onenand_calc_sync_timings(struct gpmc_timings *t, |
1134 | struct gpmc_settings *s, | |
1135 | int freq, int latency) | |
1136 | { | |
1137 | struct gpmc_device_timings dev_t; | |
1138 | const int t_cer = 15; | |
1139 | const int t_avdp = 12; | |
1140 | const int t_cez = 20; /* max of t_cez, t_oez */ | |
1141 | const int t_wpl = 40; | |
1142 | const int t_wph = 30; | |
1143 | int min_gpmc_clk_period, t_ces, t_avds, t_avdh, t_ach, t_aavdh, t_rdyo; | |
1144 | ||
1145 | switch (freq) { | |
1146 | case 104: | |
1147 | min_gpmc_clk_period = 9600; /* 104 MHz */ | |
1148 | t_ces = 3; | |
1149 | t_avds = 4; | |
1150 | t_avdh = 2; | |
1151 | t_ach = 3; | |
1152 | t_aavdh = 6; | |
1153 | t_rdyo = 6; | |
1154 | break; | |
1155 | case 83: | |
1156 | min_gpmc_clk_period = 12000; /* 83 MHz */ | |
1157 | t_ces = 5; | |
1158 | t_avds = 4; | |
1159 | t_avdh = 2; | |
1160 | t_ach = 6; | |
1161 | t_aavdh = 6; | |
1162 | t_rdyo = 9; | |
1163 | break; | |
1164 | case 66: | |
1165 | min_gpmc_clk_period = 15000; /* 66 MHz */ | |
1166 | t_ces = 6; | |
1167 | t_avds = 5; | |
1168 | t_avdh = 2; | |
1169 | t_ach = 6; | |
1170 | t_aavdh = 6; | |
1171 | t_rdyo = 11; | |
1172 | break; | |
1173 | default: | |
1174 | min_gpmc_clk_period = 18500; /* 54 MHz */ | |
1175 | t_ces = 7; | |
1176 | t_avds = 7; | |
1177 | t_avdh = 7; | |
1178 | t_ach = 9; | |
1179 | t_aavdh = 7; | |
1180 | t_rdyo = 15; | |
1181 | break; | |
1182 | } | |
1183 | ||
1184 | /* Set synchronous read timings */ | |
1185 | memset(&dev_t, 0, sizeof(dev_t)); | |
1186 | ||
1187 | if (!s->sync_write) { | |
1188 | dev_t.t_avdp_w = max(t_avdp, t_cer) * 1000; | |
1189 | dev_t.t_wpl = t_wpl * 1000; | |
1190 | dev_t.t_wph = t_wph * 1000; | |
1191 | dev_t.t_aavdh = t_aavdh * 1000; | |
1192 | } | |
1193 | dev_t.ce_xdelay = true; | |
1194 | dev_t.avd_xdelay = true; | |
1195 | dev_t.oe_xdelay = true; | |
1196 | dev_t.we_xdelay = true; | |
1197 | dev_t.clk = min_gpmc_clk_period; | |
1198 | dev_t.t_bacc = dev_t.clk; | |
1199 | dev_t.t_ces = t_ces * 1000; | |
1200 | dev_t.t_avds = t_avds * 1000; | |
1201 | dev_t.t_avdh = t_avdh * 1000; | |
1202 | dev_t.t_ach = t_ach * 1000; | |
1203 | dev_t.cyc_iaa = (latency + 1); | |
1204 | dev_t.t_cez_r = t_cez * 1000; | |
1205 | dev_t.t_cez_w = dev_t.t_cez_r; | |
1206 | dev_t.cyc_aavdh_oe = 1; | |
1207 | dev_t.t_rdyo = t_rdyo * 1000 + min_gpmc_clk_period; | |
1208 | ||
1209 | gpmc_calc_timings(t, s, &dev_t); | |
1210 | } | |
1211 | ||
1212 | int gpmc_omap_onenand_set_timings(struct device *dev, int cs, int freq, | |
1213 | int latency, | |
1214 | struct gpmc_onenand_info *info) | |
1215 | { | |
1216 | int ret; | |
1217 | struct gpmc_timings gpmc_t; | |
1218 | struct gpmc_settings gpmc_s; | |
1219 | ||
1220 | gpmc_read_settings_dt(dev->of_node, &gpmc_s); | |
1221 | ||
1222 | info->sync_read = gpmc_s.sync_read; | |
1223 | info->sync_write = gpmc_s.sync_write; | |
1224 | info->burst_len = gpmc_s.burst_len; | |
1225 | ||
1226 | if (!gpmc_s.sync_read && !gpmc_s.sync_write) | |
1227 | return 0; | |
1228 | ||
1229 | gpmc_omap_onenand_calc_sync_timings(&gpmc_t, &gpmc_s, freq, latency); | |
1230 | ||
1231 | ret = gpmc_cs_program_settings(cs, &gpmc_s); | |
1232 | if (ret < 0) | |
1233 | return ret; | |
1234 | ||
1235 | return gpmc_cs_set_timings(cs, &gpmc_t, &gpmc_s); | |
1236 | } | |
1237 | EXPORT_SYMBOL_GPL(gpmc_omap_onenand_set_timings); | |
1238 | ||
1cd53458 | 1239 | int gpmc_get_client_irq(unsigned int irq_config) |
6b6c32fc | 1240 | { |
384258f2 RQ |
1241 | if (!gpmc_irq_domain) { |
1242 | pr_warn("%s called before GPMC IRQ domain available\n", | |
1243 | __func__); | |
6b6c32fc | 1244 | return 0; |
384258f2 | 1245 | } |
6b6c32fc | 1246 | |
b2bac25a RQ |
1247 | /* we restrict this to NAND IRQs only */ |
1248 | if (irq_config >= GPMC_NR_NAND_IRQS) | |
384258f2 | 1249 | return 0; |
6b6c32fc | 1250 | |
384258f2 | 1251 | return irq_create_mapping(gpmc_irq_domain, irq_config); |
6b6c32fc AM |
1252 | } |
1253 | ||
384258f2 | 1254 | static int gpmc_irq_endis(unsigned long hwirq, bool endis) |
6b6c32fc | 1255 | { |
6b6c32fc AM |
1256 | u32 regval; |
1257 | ||
b2bac25a RQ |
1258 | /* bits GPMC_NR_NAND_IRQS to 8 are reserved */ |
1259 | if (hwirq >= GPMC_NR_NAND_IRQS) | |
1260 | hwirq += 8 - GPMC_NR_NAND_IRQS; | |
1261 | ||
384258f2 RQ |
1262 | regval = gpmc_read_reg(GPMC_IRQENABLE); |
1263 | if (endis) | |
1264 | regval |= BIT(hwirq); | |
1265 | else | |
1266 | regval &= ~BIT(hwirq); | |
1267 | gpmc_write_reg(GPMC_IRQENABLE, regval); | |
6b6c32fc AM |
1268 | |
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | static void gpmc_irq_disable(struct irq_data *p) | |
1273 | { | |
384258f2 | 1274 | gpmc_irq_endis(p->hwirq, false); |
6b6c32fc AM |
1275 | } |
1276 | ||
1277 | static void gpmc_irq_enable(struct irq_data *p) | |
1278 | { | |
384258f2 | 1279 | gpmc_irq_endis(p->hwirq, true); |
6b6c32fc AM |
1280 | } |
1281 | ||
b2bac25a RQ |
1282 | static void gpmc_irq_mask(struct irq_data *d) |
1283 | { | |
1284 | gpmc_irq_endis(d->hwirq, false); | |
1285 | } | |
1286 | ||
1287 | static void gpmc_irq_unmask(struct irq_data *d) | |
1288 | { | |
1289 | gpmc_irq_endis(d->hwirq, true); | |
1290 | } | |
1291 | ||
1292 | static void gpmc_irq_edge_config(unsigned long hwirq, bool rising_edge) | |
1293 | { | |
1294 | u32 regval; | |
1295 | ||
1296 | /* NAND IRQs polarity is not configurable */ | |
1297 | if (hwirq < GPMC_NR_NAND_IRQS) | |
1298 | return; | |
1299 | ||
1300 | /* WAITPIN starts at BIT 8 */ | |
1301 | hwirq += 8 - GPMC_NR_NAND_IRQS; | |
1302 | ||
1303 | regval = gpmc_read_reg(GPMC_CONFIG); | |
1304 | if (rising_edge) | |
1305 | regval &= ~BIT(hwirq); | |
1306 | else | |
1307 | regval |= BIT(hwirq); | |
1308 | ||
1309 | gpmc_write_reg(GPMC_CONFIG, regval); | |
1310 | } | |
1311 | ||
1312 | static void gpmc_irq_ack(struct irq_data *d) | |
1313 | { | |
1314 | unsigned int hwirq = d->hwirq; | |
1315 | ||
1316 | /* skip reserved bits */ | |
1317 | if (hwirq >= GPMC_NR_NAND_IRQS) | |
1318 | hwirq += 8 - GPMC_NR_NAND_IRQS; | |
1319 | ||
1320 | /* Setting bit to 1 clears (or Acks) the interrupt */ | |
1321 | gpmc_write_reg(GPMC_IRQSTATUS, BIT(hwirq)); | |
1322 | } | |
1323 | ||
1324 | static int gpmc_irq_set_type(struct irq_data *d, unsigned int trigger) | |
1325 | { | |
1326 | /* can't set type for NAND IRQs */ | |
1327 | if (d->hwirq < GPMC_NR_NAND_IRQS) | |
1328 | return -EINVAL; | |
1329 | ||
1330 | /* We can support either rising or falling edge at a time */ | |
1331 | if (trigger == IRQ_TYPE_EDGE_FALLING) | |
1332 | gpmc_irq_edge_config(d->hwirq, false); | |
1333 | else if (trigger == IRQ_TYPE_EDGE_RISING) | |
1334 | gpmc_irq_edge_config(d->hwirq, true); | |
1335 | else | |
1336 | return -EINVAL; | |
6b6c32fc | 1337 | |
b2bac25a RQ |
1338 | return 0; |
1339 | } | |
6b6c32fc | 1340 | |
384258f2 RQ |
1341 | static int gpmc_irq_map(struct irq_domain *d, unsigned int virq, |
1342 | irq_hw_number_t hw) | |
6b6c32fc | 1343 | { |
384258f2 RQ |
1344 | struct gpmc_device *gpmc = d->host_data; |
1345 | ||
1346 | irq_set_chip_data(virq, gpmc); | |
b2bac25a RQ |
1347 | if (hw < GPMC_NR_NAND_IRQS) { |
1348 | irq_modify_status(virq, IRQ_NOREQUEST, IRQ_NOAUTOEN); | |
1349 | irq_set_chip_and_handler(virq, &gpmc->irq_chip, | |
1350 | handle_simple_irq); | |
1351 | } else { | |
1352 | irq_set_chip_and_handler(virq, &gpmc->irq_chip, | |
1353 | handle_edge_irq); | |
1354 | } | |
384258f2 RQ |
1355 | |
1356 | return 0; | |
1357 | } | |
1358 | ||
1359 | static const struct irq_domain_ops gpmc_irq_domain_ops = { | |
1360 | .map = gpmc_irq_map, | |
1361 | .xlate = irq_domain_xlate_twocell, | |
1362 | }; | |
1363 | ||
1364 | static irqreturn_t gpmc_handle_irq(int irq, void *data) | |
1365 | { | |
1366 | int hwirq, virq; | |
b2bac25a | 1367 | u32 regval, regvalx; |
384258f2 | 1368 | struct gpmc_device *gpmc = data; |
6b6c32fc | 1369 | |
384258f2 | 1370 | regval = gpmc_read_reg(GPMC_IRQSTATUS); |
b2bac25a | 1371 | regvalx = regval; |
6b6c32fc | 1372 | |
384258f2 RQ |
1373 | if (!regval) |
1374 | return IRQ_NONE; | |
6b6c32fc | 1375 | |
b2bac25a RQ |
1376 | for (hwirq = 0; hwirq < gpmc->nirqs; hwirq++) { |
1377 | /* skip reserved status bits */ | |
1378 | if (hwirq == GPMC_NR_NAND_IRQS) | |
1379 | regvalx >>= 8 - GPMC_NR_NAND_IRQS; | |
1380 | ||
1381 | if (regvalx & BIT(hwirq)) { | |
384258f2 RQ |
1382 | virq = irq_find_mapping(gpmc_irq_domain, hwirq); |
1383 | if (!virq) { | |
1384 | dev_warn(gpmc->dev, | |
1385 | "spurious irq detected hwirq %d, virq %d\n", | |
1386 | hwirq, virq); | |
1387 | } | |
1388 | ||
1389 | generic_handle_irq(virq); | |
1390 | } | |
6b6c32fc AM |
1391 | } |
1392 | ||
384258f2 RQ |
1393 | gpmc_write_reg(GPMC_IRQSTATUS, regval); |
1394 | ||
1395 | return IRQ_HANDLED; | |
1396 | } | |
1397 | ||
1398 | static int gpmc_setup_irq(struct gpmc_device *gpmc) | |
1399 | { | |
1400 | u32 regval; | |
1401 | int rc; | |
1402 | ||
6b6c32fc AM |
1403 | /* Disable interrupts */ |
1404 | gpmc_write_reg(GPMC_IRQENABLE, 0); | |
1405 | ||
1406 | /* clear interrupts */ | |
1407 | regval = gpmc_read_reg(GPMC_IRQSTATUS); | |
1408 | gpmc_write_reg(GPMC_IRQSTATUS, regval); | |
1409 | ||
384258f2 | 1410 | gpmc->irq_chip.name = "gpmc"; |
384258f2 RQ |
1411 | gpmc->irq_chip.irq_enable = gpmc_irq_enable; |
1412 | gpmc->irq_chip.irq_disable = gpmc_irq_disable; | |
b2bac25a RQ |
1413 | gpmc->irq_chip.irq_ack = gpmc_irq_ack; |
1414 | gpmc->irq_chip.irq_mask = gpmc_irq_mask; | |
1415 | gpmc->irq_chip.irq_unmask = gpmc_irq_unmask; | |
1416 | gpmc->irq_chip.irq_set_type = gpmc_irq_set_type; | |
384258f2 RQ |
1417 | |
1418 | gpmc_irq_domain = irq_domain_add_linear(gpmc->dev->of_node, | |
b2bac25a | 1419 | gpmc->nirqs, |
384258f2 RQ |
1420 | &gpmc_irq_domain_ops, |
1421 | gpmc); | |
1422 | if (!gpmc_irq_domain) { | |
1423 | dev_err(gpmc->dev, "IRQ domain add failed\n"); | |
1424 | return -ENODEV; | |
1425 | } | |
1426 | ||
1427 | rc = request_irq(gpmc->irq, gpmc_handle_irq, 0, "gpmc", gpmc); | |
1428 | if (rc) { | |
1429 | dev_err(gpmc->dev, "failed to request irq %d: %d\n", | |
1430 | gpmc->irq, rc); | |
1431 | irq_domain_remove(gpmc_irq_domain); | |
1432 | gpmc_irq_domain = NULL; | |
1433 | } | |
1434 | ||
1435 | return rc; | |
6b6c32fc AM |
1436 | } |
1437 | ||
384258f2 | 1438 | static int gpmc_free_irq(struct gpmc_device *gpmc) |
da496873 | 1439 | { |
384258f2 | 1440 | int hwirq; |
da496873 | 1441 | |
384258f2 | 1442 | free_irq(gpmc->irq, gpmc); |
da496873 | 1443 | |
b2bac25a | 1444 | for (hwirq = 0; hwirq < gpmc->nirqs; hwirq++) |
384258f2 | 1445 | irq_dispose_mapping(irq_find_mapping(gpmc_irq_domain, hwirq)); |
da496873 | 1446 | |
384258f2 RQ |
1447 | irq_domain_remove(gpmc_irq_domain); |
1448 | gpmc_irq_domain = NULL; | |
da496873 AM |
1449 | |
1450 | return 0; | |
1451 | } | |
1452 | ||
351a102d | 1453 | static void gpmc_mem_exit(void) |
da496873 AM |
1454 | { |
1455 | int cs; | |
1456 | ||
f34f3716 | 1457 | for (cs = 0; cs < gpmc_cs_num; cs++) { |
da496873 AM |
1458 | if (!gpmc_cs_mem_enabled(cs)) |
1459 | continue; | |
1460 | gpmc_cs_delete_mem(cs); | |
1461 | } | |
da496873 AM |
1462 | } |
1463 | ||
84b00f0e | 1464 | static void gpmc_mem_init(void) |
f37e4580 | 1465 | { |
84b00f0e | 1466 | int cs; |
f37e4580 | 1467 | |
bdd7e033 | 1468 | gpmc_mem_root.start = GPMC_MEM_START; |
f37e4580 ID |
1469 | gpmc_mem_root.end = GPMC_MEM_END; |
1470 | ||
1471 | /* Reserve all regions that has been set up by bootloader */ | |
f34f3716 | 1472 | for (cs = 0; cs < gpmc_cs_num; cs++) { |
f37e4580 ID |
1473 | u32 base, size; |
1474 | ||
1475 | if (!gpmc_cs_mem_enabled(cs)) | |
1476 | continue; | |
1477 | gpmc_cs_get_memconf(cs, &base, &size); | |
84b00f0e JH |
1478 | if (gpmc_cs_insert_mem(cs, base, size)) { |
1479 | pr_warn("%s: disabling cs %d mapped at 0x%x-0x%x\n", | |
1480 | __func__, cs, base, base + size); | |
1481 | gpmc_cs_disable_mem(cs); | |
8119024e | 1482 | } |
f37e4580 | 1483 | } |
4bbbc1ad JY |
1484 | } |
1485 | ||
246da26d AM |
1486 | static u32 gpmc_round_ps_to_sync_clk(u32 time_ps, u32 sync_clk) |
1487 | { | |
1488 | u32 temp; | |
1489 | int div; | |
1490 | ||
1491 | div = gpmc_calc_divider(sync_clk); | |
1492 | temp = gpmc_ps_to_ticks(time_ps); | |
1493 | temp = (temp + div - 1) / div; | |
1494 | return gpmc_ticks_to_ps(temp * div); | |
1495 | } | |
1496 | ||
1497 | /* XXX: can the cycles be avoided ? */ | |
1498 | static int gpmc_calc_sync_read_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1499 | struct gpmc_device_timings *dev_t, |
1500 | bool mux) | |
246da26d | 1501 | { |
246da26d AM |
1502 | u32 temp; |
1503 | ||
1504 | /* adv_rd_off */ | |
1505 | temp = dev_t->t_avdp_r; | |
1506 | /* XXX: mux check required ? */ | |
1507 | if (mux) { | |
1508 | /* XXX: t_avdp not to be required for sync, only added for tusb | |
1509 | * this indirectly necessitates requirement of t_avdp_r and | |
1510 | * t_avdp_w instead of having a single t_avdp | |
1511 | */ | |
1512 | temp = max_t(u32, temp, gpmc_t->clk_activation + dev_t->t_avdh); | |
1513 | temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); | |
1514 | } | |
1515 | gpmc_t->adv_rd_off = gpmc_round_ps_to_ticks(temp); | |
1516 | ||
1517 | /* oe_on */ | |
1518 | temp = dev_t->t_oeasu; /* XXX: remove this ? */ | |
1519 | if (mux) { | |
1520 | temp = max_t(u32, temp, gpmc_t->clk_activation + dev_t->t_ach); | |
1521 | temp = max_t(u32, temp, gpmc_t->adv_rd_off + | |
1522 | gpmc_ticks_to_ps(dev_t->cyc_aavdh_oe)); | |
1523 | } | |
1524 | gpmc_t->oe_on = gpmc_round_ps_to_ticks(temp); | |
1525 | ||
1526 | /* access */ | |
1527 | /* XXX: any scope for improvement ?, by combining oe_on | |
1528 | * and clk_activation, need to check whether | |
1529 | * access = clk_activation + round to sync clk ? | |
1530 | */ | |
1531 | temp = max_t(u32, dev_t->t_iaa, dev_t->cyc_iaa * gpmc_t->sync_clk); | |
1532 | temp += gpmc_t->clk_activation; | |
1533 | if (dev_t->cyc_oe) | |
1534 | temp = max_t(u32, temp, gpmc_t->oe_on + | |
1535 | gpmc_ticks_to_ps(dev_t->cyc_oe)); | |
1536 | gpmc_t->access = gpmc_round_ps_to_ticks(temp); | |
1537 | ||
1538 | gpmc_t->oe_off = gpmc_t->access + gpmc_ticks_to_ps(1); | |
1539 | gpmc_t->cs_rd_off = gpmc_t->oe_off; | |
1540 | ||
1541 | /* rd_cycle */ | |
1542 | temp = max_t(u32, dev_t->t_cez_r, dev_t->t_oez); | |
1543 | temp = gpmc_round_ps_to_sync_clk(temp, gpmc_t->sync_clk) + | |
1544 | gpmc_t->access; | |
1545 | /* XXX: barter t_ce_rdyz with t_cez_r ? */ | |
1546 | if (dev_t->t_ce_rdyz) | |
1547 | temp = max_t(u32, temp, gpmc_t->cs_rd_off + dev_t->t_ce_rdyz); | |
1548 | gpmc_t->rd_cycle = gpmc_round_ps_to_ticks(temp); | |
1549 | ||
1550 | return 0; | |
1551 | } | |
1552 | ||
1553 | static int gpmc_calc_sync_write_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1554 | struct gpmc_device_timings *dev_t, |
1555 | bool mux) | |
246da26d | 1556 | { |
246da26d AM |
1557 | u32 temp; |
1558 | ||
1559 | /* adv_wr_off */ | |
1560 | temp = dev_t->t_avdp_w; | |
1561 | if (mux) { | |
1562 | temp = max_t(u32, temp, | |
1563 | gpmc_t->clk_activation + dev_t->t_avdh); | |
1564 | temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); | |
1565 | } | |
1566 | gpmc_t->adv_wr_off = gpmc_round_ps_to_ticks(temp); | |
1567 | ||
1568 | /* wr_data_mux_bus */ | |
1569 | temp = max_t(u32, dev_t->t_weasu, | |
1570 | gpmc_t->clk_activation + dev_t->t_rdyo); | |
1571 | /* XXX: shouldn't mux be kept as a whole for wr_data_mux_bus ?, | |
1572 | * and in that case remember to handle we_on properly | |
1573 | */ | |
1574 | if (mux) { | |
1575 | temp = max_t(u32, temp, | |
1576 | gpmc_t->adv_wr_off + dev_t->t_aavdh); | |
1577 | temp = max_t(u32, temp, gpmc_t->adv_wr_off + | |
1578 | gpmc_ticks_to_ps(dev_t->cyc_aavdh_we)); | |
1579 | } | |
1580 | gpmc_t->wr_data_mux_bus = gpmc_round_ps_to_ticks(temp); | |
1581 | ||
1582 | /* we_on */ | |
1583 | if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS) | |
1584 | gpmc_t->we_on = gpmc_round_ps_to_ticks(dev_t->t_weasu); | |
1585 | else | |
1586 | gpmc_t->we_on = gpmc_t->wr_data_mux_bus; | |
1587 | ||
1588 | /* wr_access */ | |
1589 | /* XXX: gpmc_capability check reqd ? , even if not, will not harm */ | |
1590 | gpmc_t->wr_access = gpmc_t->access; | |
1591 | ||
1592 | /* we_off */ | |
1593 | temp = gpmc_t->we_on + dev_t->t_wpl; | |
1594 | temp = max_t(u32, temp, | |
1595 | gpmc_t->wr_access + gpmc_ticks_to_ps(1)); | |
1596 | temp = max_t(u32, temp, | |
1597 | gpmc_t->we_on + gpmc_ticks_to_ps(dev_t->cyc_wpl)); | |
1598 | gpmc_t->we_off = gpmc_round_ps_to_ticks(temp); | |
1599 | ||
1600 | gpmc_t->cs_wr_off = gpmc_round_ps_to_ticks(gpmc_t->we_off + | |
1601 | dev_t->t_wph); | |
1602 | ||
1603 | /* wr_cycle */ | |
1604 | temp = gpmc_round_ps_to_sync_clk(dev_t->t_cez_w, gpmc_t->sync_clk); | |
1605 | temp += gpmc_t->wr_access; | |
1606 | /* XXX: barter t_ce_rdyz with t_cez_w ? */ | |
1607 | if (dev_t->t_ce_rdyz) | |
1608 | temp = max_t(u32, temp, | |
1609 | gpmc_t->cs_wr_off + dev_t->t_ce_rdyz); | |
1610 | gpmc_t->wr_cycle = gpmc_round_ps_to_ticks(temp); | |
1611 | ||
1612 | return 0; | |
1613 | } | |
1614 | ||
1615 | static int gpmc_calc_async_read_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1616 | struct gpmc_device_timings *dev_t, |
1617 | bool mux) | |
246da26d | 1618 | { |
246da26d AM |
1619 | u32 temp; |
1620 | ||
1621 | /* adv_rd_off */ | |
1622 | temp = dev_t->t_avdp_r; | |
1623 | if (mux) | |
1624 | temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); | |
1625 | gpmc_t->adv_rd_off = gpmc_round_ps_to_ticks(temp); | |
1626 | ||
1627 | /* oe_on */ | |
1628 | temp = dev_t->t_oeasu; | |
1629 | if (mux) | |
cdd1aeae | 1630 | temp = max_t(u32, temp, gpmc_t->adv_rd_off + dev_t->t_aavdh); |
246da26d AM |
1631 | gpmc_t->oe_on = gpmc_round_ps_to_ticks(temp); |
1632 | ||
1633 | /* access */ | |
1634 | temp = max_t(u32, dev_t->t_iaa, /* XXX: remove t_iaa in async ? */ | |
cdd1aeae KK |
1635 | gpmc_t->oe_on + dev_t->t_oe); |
1636 | temp = max_t(u32, temp, gpmc_t->cs_on + dev_t->t_ce); | |
1637 | temp = max_t(u32, temp, gpmc_t->adv_on + dev_t->t_aa); | |
246da26d AM |
1638 | gpmc_t->access = gpmc_round_ps_to_ticks(temp); |
1639 | ||
1640 | gpmc_t->oe_off = gpmc_t->access + gpmc_ticks_to_ps(1); | |
1641 | gpmc_t->cs_rd_off = gpmc_t->oe_off; | |
1642 | ||
1643 | /* rd_cycle */ | |
1644 | temp = max_t(u32, dev_t->t_rd_cycle, | |
1645 | gpmc_t->cs_rd_off + dev_t->t_cez_r); | |
1646 | temp = max_t(u32, temp, gpmc_t->oe_off + dev_t->t_oez); | |
1647 | gpmc_t->rd_cycle = gpmc_round_ps_to_ticks(temp); | |
1648 | ||
1649 | return 0; | |
1650 | } | |
1651 | ||
1652 | static int gpmc_calc_async_write_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1653 | struct gpmc_device_timings *dev_t, |
1654 | bool mux) | |
246da26d | 1655 | { |
246da26d AM |
1656 | u32 temp; |
1657 | ||
1658 | /* adv_wr_off */ | |
1659 | temp = dev_t->t_avdp_w; | |
1660 | if (mux) | |
1661 | temp = max_t(u32, gpmc_t->adv_on + gpmc_ticks_to_ps(1), temp); | |
1662 | gpmc_t->adv_wr_off = gpmc_round_ps_to_ticks(temp); | |
1663 | ||
1664 | /* wr_data_mux_bus */ | |
1665 | temp = dev_t->t_weasu; | |
1666 | if (mux) { | |
1667 | temp = max_t(u32, temp, gpmc_t->adv_wr_off + dev_t->t_aavdh); | |
1668 | temp = max_t(u32, temp, gpmc_t->adv_wr_off + | |
1669 | gpmc_ticks_to_ps(dev_t->cyc_aavdh_we)); | |
1670 | } | |
1671 | gpmc_t->wr_data_mux_bus = gpmc_round_ps_to_ticks(temp); | |
1672 | ||
1673 | /* we_on */ | |
1674 | if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS) | |
1675 | gpmc_t->we_on = gpmc_round_ps_to_ticks(dev_t->t_weasu); | |
1676 | else | |
1677 | gpmc_t->we_on = gpmc_t->wr_data_mux_bus; | |
1678 | ||
1679 | /* we_off */ | |
1680 | temp = gpmc_t->we_on + dev_t->t_wpl; | |
1681 | gpmc_t->we_off = gpmc_round_ps_to_ticks(temp); | |
1682 | ||
1683 | gpmc_t->cs_wr_off = gpmc_round_ps_to_ticks(gpmc_t->we_off + | |
1684 | dev_t->t_wph); | |
1685 | ||
1686 | /* wr_cycle */ | |
1687 | temp = max_t(u32, dev_t->t_wr_cycle, | |
1688 | gpmc_t->cs_wr_off + dev_t->t_cez_w); | |
1689 | gpmc_t->wr_cycle = gpmc_round_ps_to_ticks(temp); | |
1690 | ||
1691 | return 0; | |
1692 | } | |
1693 | ||
1694 | static int gpmc_calc_sync_common_timings(struct gpmc_timings *gpmc_t, | |
1695 | struct gpmc_device_timings *dev_t) | |
1696 | { | |
1697 | u32 temp; | |
1698 | ||
1699 | gpmc_t->sync_clk = gpmc_calc_divider(dev_t->clk) * | |
1700 | gpmc_get_fclk_period(); | |
1701 | ||
1702 | gpmc_t->page_burst_access = gpmc_round_ps_to_sync_clk( | |
1703 | dev_t->t_bacc, | |
1704 | gpmc_t->sync_clk); | |
1705 | ||
1706 | temp = max_t(u32, dev_t->t_ces, dev_t->t_avds); | |
1707 | gpmc_t->clk_activation = gpmc_round_ps_to_ticks(temp); | |
1708 | ||
1709 | if (gpmc_calc_divider(gpmc_t->sync_clk) != 1) | |
1710 | return 0; | |
1711 | ||
1712 | if (dev_t->ce_xdelay) | |
1713 | gpmc_t->bool_timings.cs_extra_delay = true; | |
1714 | if (dev_t->avd_xdelay) | |
1715 | gpmc_t->bool_timings.adv_extra_delay = true; | |
1716 | if (dev_t->oe_xdelay) | |
1717 | gpmc_t->bool_timings.oe_extra_delay = true; | |
1718 | if (dev_t->we_xdelay) | |
1719 | gpmc_t->bool_timings.we_extra_delay = true; | |
1720 | ||
1721 | return 0; | |
1722 | } | |
1723 | ||
1724 | static int gpmc_calc_common_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1725 | struct gpmc_device_timings *dev_t, |
1726 | bool sync) | |
246da26d AM |
1727 | { |
1728 | u32 temp; | |
1729 | ||
1730 | /* cs_on */ | |
1731 | gpmc_t->cs_on = gpmc_round_ps_to_ticks(dev_t->t_ceasu); | |
1732 | ||
1733 | /* adv_on */ | |
1734 | temp = dev_t->t_avdasu; | |
1735 | if (dev_t->t_ce_avd) | |
1736 | temp = max_t(u32, temp, | |
1737 | gpmc_t->cs_on + dev_t->t_ce_avd); | |
1738 | gpmc_t->adv_on = gpmc_round_ps_to_ticks(temp); | |
1739 | ||
c3be5b45 | 1740 | if (sync) |
246da26d AM |
1741 | gpmc_calc_sync_common_timings(gpmc_t, dev_t); |
1742 | ||
1743 | return 0; | |
1744 | } | |
1745 | ||
1a1e7580 KK |
1746 | /* |
1747 | * TODO: remove this function once all peripherals are confirmed to | |
246da26d AM |
1748 | * work with generic timing. Simultaneously gpmc_cs_set_timings() |
1749 | * has to be modified to handle timings in ps instead of ns | |
1a1e7580 | 1750 | */ |
246da26d AM |
1751 | static void gpmc_convert_ps_to_ns(struct gpmc_timings *t) |
1752 | { | |
1753 | t->cs_on /= 1000; | |
1754 | t->cs_rd_off /= 1000; | |
1755 | t->cs_wr_off /= 1000; | |
1756 | t->adv_on /= 1000; | |
1757 | t->adv_rd_off /= 1000; | |
1758 | t->adv_wr_off /= 1000; | |
1759 | t->we_on /= 1000; | |
1760 | t->we_off /= 1000; | |
1761 | t->oe_on /= 1000; | |
1762 | t->oe_off /= 1000; | |
1763 | t->page_burst_access /= 1000; | |
1764 | t->access /= 1000; | |
1765 | t->rd_cycle /= 1000; | |
1766 | t->wr_cycle /= 1000; | |
1767 | t->bus_turnaround /= 1000; | |
1768 | t->cycle2cycle_delay /= 1000; | |
1769 | t->wait_monitoring /= 1000; | |
1770 | t->clk_activation /= 1000; | |
1771 | t->wr_access /= 1000; | |
1772 | t->wr_data_mux_bus /= 1000; | |
1773 | } | |
1774 | ||
1775 | int gpmc_calc_timings(struct gpmc_timings *gpmc_t, | |
c3be5b45 JH |
1776 | struct gpmc_settings *gpmc_s, |
1777 | struct gpmc_device_timings *dev_t) | |
246da26d | 1778 | { |
c3be5b45 JH |
1779 | bool mux = false, sync = false; |
1780 | ||
1781 | if (gpmc_s) { | |
1782 | mux = gpmc_s->mux_add_data ? true : false; | |
1783 | sync = (gpmc_s->sync_read || gpmc_s->sync_write); | |
1784 | } | |
1785 | ||
246da26d AM |
1786 | memset(gpmc_t, 0, sizeof(*gpmc_t)); |
1787 | ||
c3be5b45 | 1788 | gpmc_calc_common_timings(gpmc_t, dev_t, sync); |
246da26d | 1789 | |
c3be5b45 JH |
1790 | if (gpmc_s && gpmc_s->sync_read) |
1791 | gpmc_calc_sync_read_timings(gpmc_t, dev_t, mux); | |
246da26d | 1792 | else |
c3be5b45 | 1793 | gpmc_calc_async_read_timings(gpmc_t, dev_t, mux); |
246da26d | 1794 | |
c3be5b45 JH |
1795 | if (gpmc_s && gpmc_s->sync_write) |
1796 | gpmc_calc_sync_write_timings(gpmc_t, dev_t, mux); | |
246da26d | 1797 | else |
c3be5b45 | 1798 | gpmc_calc_async_write_timings(gpmc_t, dev_t, mux); |
246da26d AM |
1799 | |
1800 | /* TODO: remove, see function definition */ | |
1801 | gpmc_convert_ps_to_ns(gpmc_t); | |
1802 | ||
1803 | return 0; | |
1804 | } | |
1805 | ||
aa8d4767 JH |
1806 | /** |
1807 | * gpmc_cs_program_settings - programs non-timing related settings | |
1808 | * @cs: GPMC chip-select to program | |
1809 | * @p: pointer to GPMC settings structure | |
1810 | * | |
1811 | * Programs non-timing related settings for a GPMC chip-select, such as | |
1812 | * bus-width, burst configuration, etc. Function should be called once | |
1813 | * for each chip-select that is being used and must be called before | |
1814 | * calling gpmc_cs_set_timings() as timing parameters in the CONFIG1 | |
1815 | * register will be initialised to zero by this function. Returns 0 on | |
1816 | * success and appropriate negative error code on failure. | |
1817 | */ | |
1818 | int gpmc_cs_program_settings(int cs, struct gpmc_settings *p) | |
1819 | { | |
1820 | u32 config1; | |
1821 | ||
1822 | if ((!p->device_width) || (p->device_width > GPMC_DEVWIDTH_16BIT)) { | |
1823 | pr_err("%s: invalid width %d!", __func__, p->device_width); | |
1824 | return -EINVAL; | |
1825 | } | |
1826 | ||
1827 | /* Address-data multiplexing not supported for NAND devices */ | |
1828 | if (p->device_nand && p->mux_add_data) { | |
1829 | pr_err("%s: invalid configuration!\n", __func__); | |
1830 | return -EINVAL; | |
1831 | } | |
1832 | ||
1833 | if ((p->mux_add_data > GPMC_MUX_AD) || | |
1834 | ((p->mux_add_data == GPMC_MUX_AAD) && | |
1835 | !(gpmc_capability & GPMC_HAS_MUX_AAD))) { | |
1836 | pr_err("%s: invalid multiplex configuration!\n", __func__); | |
1837 | return -EINVAL; | |
1838 | } | |
1839 | ||
1840 | /* Page/burst mode supports lengths of 4, 8 and 16 bytes */ | |
1841 | if (p->burst_read || p->burst_write) { | |
1842 | switch (p->burst_len) { | |
1843 | case GPMC_BURST_4: | |
1844 | case GPMC_BURST_8: | |
1845 | case GPMC_BURST_16: | |
1846 | break; | |
1847 | default: | |
1848 | pr_err("%s: invalid page/burst-length (%d)\n", | |
1849 | __func__, p->burst_len); | |
1850 | return -EINVAL; | |
1851 | } | |
1852 | } | |
1853 | ||
2b54057c | 1854 | if (p->wait_pin > gpmc_nr_waitpins) { |
aa8d4767 JH |
1855 | pr_err("%s: invalid wait-pin (%d)\n", __func__, p->wait_pin); |
1856 | return -EINVAL; | |
1857 | } | |
1858 | ||
1859 | config1 = GPMC_CONFIG1_DEVICESIZE((p->device_width - 1)); | |
1860 | ||
1861 | if (p->sync_read) | |
1862 | config1 |= GPMC_CONFIG1_READTYPE_SYNC; | |
1863 | if (p->sync_write) | |
1864 | config1 |= GPMC_CONFIG1_WRITETYPE_SYNC; | |
1865 | if (p->wait_on_read) | |
1866 | config1 |= GPMC_CONFIG1_WAIT_READ_MON; | |
1867 | if (p->wait_on_write) | |
1868 | config1 |= GPMC_CONFIG1_WAIT_WRITE_MON; | |
1869 | if (p->wait_on_read || p->wait_on_write) | |
1870 | config1 |= GPMC_CONFIG1_WAIT_PIN_SEL(p->wait_pin); | |
1871 | if (p->device_nand) | |
1872 | config1 |= GPMC_CONFIG1_DEVICETYPE(GPMC_DEVICETYPE_NAND); | |
1873 | if (p->mux_add_data) | |
1874 | config1 |= GPMC_CONFIG1_MUXTYPE(p->mux_add_data); | |
1875 | if (p->burst_read) | |
1876 | config1 |= GPMC_CONFIG1_READMULTIPLE_SUPP; | |
1877 | if (p->burst_write) | |
1878 | config1 |= GPMC_CONFIG1_WRITEMULTIPLE_SUPP; | |
1879 | if (p->burst_read || p->burst_write) { | |
1880 | config1 |= GPMC_CONFIG1_PAGE_LEN(p->burst_len >> 3); | |
1881 | config1 |= p->burst_wrap ? GPMC_CONFIG1_WRAPBURST_SUPP : 0; | |
1882 | } | |
1883 | ||
1884 | gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, config1); | |
1885 | ||
1886 | return 0; | |
1887 | } | |
1888 | ||
bc6b1e7b | 1889 | #ifdef CONFIG_OF |
31957609 | 1890 | static const struct of_device_id gpmc_dt_ids[] = { |
bc6b1e7b DM |
1891 | { .compatible = "ti,omap2420-gpmc" }, |
1892 | { .compatible = "ti,omap2430-gpmc" }, | |
1893 | { .compatible = "ti,omap3430-gpmc" }, /* omap3430 & omap3630 */ | |
1894 | { .compatible = "ti,omap4430-gpmc" }, /* omap4430 & omap4460 & omap543x */ | |
1895 | { .compatible = "ti,am3352-gpmc" }, /* am335x devices */ | |
1896 | { } | |
1897 | }; | |
bc6b1e7b | 1898 | |
8c8a7771 JH |
1899 | /** |
1900 | * gpmc_read_settings_dt - read gpmc settings from device-tree | |
1901 | * @np: pointer to device-tree node for a gpmc child device | |
1902 | * @p: pointer to gpmc settings structure | |
1903 | * | |
1904 | * Reads the GPMC settings for a GPMC child device from device-tree and | |
1905 | * stores them in the GPMC settings structure passed. The GPMC settings | |
1906 | * structure is initialised to zero by this function and so any | |
1907 | * previously stored settings will be cleared. | |
1908 | */ | |
1909 | void gpmc_read_settings_dt(struct device_node *np, struct gpmc_settings *p) | |
1910 | { | |
1911 | memset(p, 0, sizeof(struct gpmc_settings)); | |
1912 | ||
1913 | p->sync_read = of_property_read_bool(np, "gpmc,sync-read"); | |
1914 | p->sync_write = of_property_read_bool(np, "gpmc,sync-write"); | |
8c8a7771 JH |
1915 | of_property_read_u32(np, "gpmc,device-width", &p->device_width); |
1916 | of_property_read_u32(np, "gpmc,mux-add-data", &p->mux_add_data); | |
1917 | ||
1918 | if (!of_property_read_u32(np, "gpmc,burst-length", &p->burst_len)) { | |
1919 | p->burst_wrap = of_property_read_bool(np, "gpmc,burst-wrap"); | |
1920 | p->burst_read = of_property_read_bool(np, "gpmc,burst-read"); | |
1921 | p->burst_write = of_property_read_bool(np, "gpmc,burst-write"); | |
1922 | if (!p->burst_read && !p->burst_write) | |
1923 | pr_warn("%s: page/burst-length set but not used!\n", | |
1924 | __func__); | |
1925 | } | |
1926 | ||
1927 | if (!of_property_read_u32(np, "gpmc,wait-pin", &p->wait_pin)) { | |
1928 | p->wait_on_read = of_property_read_bool(np, | |
1929 | "gpmc,wait-on-read"); | |
1930 | p->wait_on_write = of_property_read_bool(np, | |
1931 | "gpmc,wait-on-write"); | |
1932 | if (!p->wait_on_read && !p->wait_on_write) | |
2b54057c RQ |
1933 | pr_debug("%s: rd/wr wait monitoring not enabled!\n", |
1934 | __func__); | |
8c8a7771 JH |
1935 | } |
1936 | } | |
1937 | ||
bc6b1e7b DM |
1938 | static void __maybe_unused gpmc_read_timings_dt(struct device_node *np, |
1939 | struct gpmc_timings *gpmc_t) | |
1940 | { | |
d36b4cd4 JH |
1941 | struct gpmc_bool_timings *p; |
1942 | ||
1943 | if (!np || !gpmc_t) | |
1944 | return; | |
bc6b1e7b DM |
1945 | |
1946 | memset(gpmc_t, 0, sizeof(*gpmc_t)); | |
1947 | ||
1948 | /* minimum clock period for syncronous mode */ | |
d36b4cd4 | 1949 | of_property_read_u32(np, "gpmc,sync-clk-ps", &gpmc_t->sync_clk); |
bc6b1e7b DM |
1950 | |
1951 | /* chip select timtings */ | |
d36b4cd4 JH |
1952 | of_property_read_u32(np, "gpmc,cs-on-ns", &gpmc_t->cs_on); |
1953 | of_property_read_u32(np, "gpmc,cs-rd-off-ns", &gpmc_t->cs_rd_off); | |
1954 | of_property_read_u32(np, "gpmc,cs-wr-off-ns", &gpmc_t->cs_wr_off); | |
bc6b1e7b DM |
1955 | |
1956 | /* ADV signal timings */ | |
d36b4cd4 JH |
1957 | of_property_read_u32(np, "gpmc,adv-on-ns", &gpmc_t->adv_on); |
1958 | of_property_read_u32(np, "gpmc,adv-rd-off-ns", &gpmc_t->adv_rd_off); | |
1959 | of_property_read_u32(np, "gpmc,adv-wr-off-ns", &gpmc_t->adv_wr_off); | |
2c92c04b NA |
1960 | of_property_read_u32(np, "gpmc,adv-aad-mux-on-ns", |
1961 | &gpmc_t->adv_aad_mux_on); | |
1962 | of_property_read_u32(np, "gpmc,adv-aad-mux-rd-off-ns", | |
1963 | &gpmc_t->adv_aad_mux_rd_off); | |
1964 | of_property_read_u32(np, "gpmc,adv-aad-mux-wr-off-ns", | |
1965 | &gpmc_t->adv_aad_mux_wr_off); | |
bc6b1e7b DM |
1966 | |
1967 | /* WE signal timings */ | |
d36b4cd4 JH |
1968 | of_property_read_u32(np, "gpmc,we-on-ns", &gpmc_t->we_on); |
1969 | of_property_read_u32(np, "gpmc,we-off-ns", &gpmc_t->we_off); | |
bc6b1e7b DM |
1970 | |
1971 | /* OE signal timings */ | |
d36b4cd4 JH |
1972 | of_property_read_u32(np, "gpmc,oe-on-ns", &gpmc_t->oe_on); |
1973 | of_property_read_u32(np, "gpmc,oe-off-ns", &gpmc_t->oe_off); | |
2c92c04b NA |
1974 | of_property_read_u32(np, "gpmc,oe-aad-mux-on-ns", |
1975 | &gpmc_t->oe_aad_mux_on); | |
1976 | of_property_read_u32(np, "gpmc,oe-aad-mux-off-ns", | |
1977 | &gpmc_t->oe_aad_mux_off); | |
bc6b1e7b DM |
1978 | |
1979 | /* access and cycle timings */ | |
d36b4cd4 JH |
1980 | of_property_read_u32(np, "gpmc,page-burst-access-ns", |
1981 | &gpmc_t->page_burst_access); | |
1982 | of_property_read_u32(np, "gpmc,access-ns", &gpmc_t->access); | |
1983 | of_property_read_u32(np, "gpmc,rd-cycle-ns", &gpmc_t->rd_cycle); | |
1984 | of_property_read_u32(np, "gpmc,wr-cycle-ns", &gpmc_t->wr_cycle); | |
1985 | of_property_read_u32(np, "gpmc,bus-turnaround-ns", | |
1986 | &gpmc_t->bus_turnaround); | |
1987 | of_property_read_u32(np, "gpmc,cycle2cycle-delay-ns", | |
1988 | &gpmc_t->cycle2cycle_delay); | |
1989 | of_property_read_u32(np, "gpmc,wait-monitoring-ns", | |
1990 | &gpmc_t->wait_monitoring); | |
1991 | of_property_read_u32(np, "gpmc,clk-activation-ns", | |
1992 | &gpmc_t->clk_activation); | |
1993 | ||
1994 | /* only applicable to OMAP3+ */ | |
1995 | of_property_read_u32(np, "gpmc,wr-access-ns", &gpmc_t->wr_access); | |
1996 | of_property_read_u32(np, "gpmc,wr-data-mux-bus-ns", | |
1997 | &gpmc_t->wr_data_mux_bus); | |
1998 | ||
1999 | /* bool timing parameters */ | |
2000 | p = &gpmc_t->bool_timings; | |
2001 | ||
2002 | p->cycle2cyclediffcsen = | |
2003 | of_property_read_bool(np, "gpmc,cycle2cycle-diffcsen"); | |
2004 | p->cycle2cyclesamecsen = | |
2005 | of_property_read_bool(np, "gpmc,cycle2cycle-samecsen"); | |
2006 | p->we_extra_delay = of_property_read_bool(np, "gpmc,we-extra-delay"); | |
2007 | p->oe_extra_delay = of_property_read_bool(np, "gpmc,oe-extra-delay"); | |
2008 | p->adv_extra_delay = of_property_read_bool(np, "gpmc,adv-extra-delay"); | |
2009 | p->cs_extra_delay = of_property_read_bool(np, "gpmc,cs-extra-delay"); | |
2010 | p->time_para_granularity = | |
2011 | of_property_read_bool(np, "gpmc,time-para-granularity"); | |
bc6b1e7b DM |
2012 | } |
2013 | ||
cdd6928c | 2014 | /** |
3af91cf7 | 2015 | * gpmc_probe_generic_child - configures the gpmc for a child device |
cdd6928c | 2016 | * @pdev: pointer to gpmc platform device |
3af91cf7 | 2017 | * @child: pointer to device-tree node for child device |
cdd6928c | 2018 | * |
3af91cf7 | 2019 | * Allocates and configures a GPMC chip-select for a child device. |
cdd6928c JH |
2020 | * Returns 0 on success and appropriate negative error code on failure. |
2021 | */ | |
3af91cf7 | 2022 | static int gpmc_probe_generic_child(struct platform_device *pdev, |
cdd6928c JH |
2023 | struct device_node *child) |
2024 | { | |
2025 | struct gpmc_settings gpmc_s; | |
2026 | struct gpmc_timings gpmc_t; | |
2027 | struct resource res; | |
2028 | unsigned long base; | |
9ed7a776 | 2029 | const char *name; |
cdd6928c | 2030 | int ret, cs; |
e378d22b | 2031 | u32 val; |
210325f0 RQ |
2032 | struct gpio_desc *waitpin_desc = NULL; |
2033 | struct gpmc_device *gpmc = platform_get_drvdata(pdev); | |
cdd6928c JH |
2034 | |
2035 | if (of_property_read_u32(child, "reg", &cs) < 0) { | |
db749d17 RH |
2036 | dev_err(&pdev->dev, "%pOF has no 'reg' property\n", |
2037 | child); | |
cdd6928c JH |
2038 | return -ENODEV; |
2039 | } | |
2040 | ||
2041 | if (of_address_to_resource(child, 0, &res) < 0) { | |
db749d17 RH |
2042 | dev_err(&pdev->dev, "%pOF has malformed 'reg' property\n", |
2043 | child); | |
cdd6928c JH |
2044 | return -ENODEV; |
2045 | } | |
2046 | ||
9ed7a776 TL |
2047 | /* |
2048 | * Check if we have multiple instances of the same device | |
2049 | * on a single chip select. If so, use the already initialized | |
2050 | * timings. | |
2051 | */ | |
2052 | name = gpmc_cs_get_name(cs); | |
c2ade654 | 2053 | if (name && of_node_name_eq(child, name)) |
d507178f | 2054 | goto no_timings; |
9ed7a776 | 2055 | |
cdd6928c JH |
2056 | ret = gpmc_cs_request(cs, resource_size(&res), &base); |
2057 | if (ret < 0) { | |
2058 | dev_err(&pdev->dev, "cannot request GPMC CS %d\n", cs); | |
2059 | return ret; | |
2060 | } | |
c2ade654 | 2061 | gpmc_cs_set_name(cs, child->full_name); |
cdd6928c | 2062 | |
35ac051e TL |
2063 | gpmc_read_settings_dt(child, &gpmc_s); |
2064 | gpmc_read_timings_dt(child, &gpmc_t); | |
cdd6928c | 2065 | |
fd4446f2 TL |
2066 | /* |
2067 | * For some GPMC devices we still need to rely on the bootloader | |
35ac051e TL |
2068 | * timings because the devices can be connected via FPGA. |
2069 | * REVISIT: Add timing support from slls644g.pdf. | |
fd4446f2 | 2070 | */ |
35ac051e TL |
2071 | if (!gpmc_t.cs_rd_off) { |
2072 | WARN(1, "enable GPMC debug to configure .dts timings for CS%i\n", | |
2073 | cs); | |
2074 | gpmc_cs_show_timings(cs, | |
2075 | "please add GPMC bootloader timings to .dts"); | |
fd4446f2 TL |
2076 | goto no_timings; |
2077 | } | |
2078 | ||
4cf27d2e RQ |
2079 | /* CS must be disabled while making changes to gpmc configuration */ |
2080 | gpmc_cs_disable_mem(cs); | |
2081 | ||
cdd6928c | 2082 | /* |
858432c7 | 2083 | * FIXME: gpmc_cs_request() will map the CS to an arbitrary |
cdd6928c JH |
2084 | * location in the gpmc address space. When booting with |
2085 | * device-tree we want the NOR flash to be mapped to the | |
2086 | * location specified in the device-tree blob. So remap the | |
2087 | * CS to this location. Once DT migration is complete should | |
2088 | * just make gpmc_cs_request() map a specific address. | |
2089 | */ | |
2090 | ret = gpmc_cs_remap(cs, res.start); | |
2091 | if (ret < 0) { | |
f70bf2a3 FE |
2092 | dev_err(&pdev->dev, "cannot remap GPMC CS %d to %pa\n", |
2093 | cs, &res.start); | |
bdd7e033 RQ |
2094 | if (res.start < GPMC_MEM_START) { |
2095 | dev_info(&pdev->dev, | |
2096 | "GPMC CS %d start cannot be lesser than 0x%x\n", | |
2097 | cs, GPMC_MEM_START); | |
2098 | } else if (res.end > GPMC_MEM_END) { | |
2099 | dev_info(&pdev->dev, | |
2100 | "GPMC CS %d end cannot be greater than 0x%x\n", | |
2101 | cs, GPMC_MEM_END); | |
2102 | } | |
cdd6928c JH |
2103 | goto err; |
2104 | } | |
2105 | ||
c2ade654 | 2106 | if (of_node_name_eq(child, "nand")) { |
c9711ec5 RQ |
2107 | /* Warn about older DT blobs with no compatible property */ |
2108 | if (!of_property_read_bool(child, "compatible")) { | |
2109 | dev_warn(&pdev->dev, | |
2110 | "Incompatible NAND node: missing compatible"); | |
2111 | ret = -EINVAL; | |
2112 | goto err; | |
2113 | } | |
2114 | } | |
2115 | ||
c2ade654 | 2116 | if (of_node_name_eq(child, "onenand")) { |
a758f50f LM |
2117 | /* Warn about older DT blobs with no compatible property */ |
2118 | if (!of_property_read_bool(child, "compatible")) { | |
2119 | dev_warn(&pdev->dev, | |
2120 | "Incompatible OneNAND node: missing compatible"); | |
2121 | ret = -EINVAL; | |
2122 | goto err; | |
2123 | } | |
2124 | } | |
2125 | ||
c9711ec5 RQ |
2126 | if (of_device_is_compatible(child, "ti,omap2-nand")) { |
2127 | /* NAND specific setup */ | |
f679888f BB |
2128 | val = 8; |
2129 | of_property_read_u32(child, "nand-bus-width", &val); | |
c9711ec5 RQ |
2130 | switch (val) { |
2131 | case 8: | |
2132 | gpmc_s.device_width = GPMC_DEVWIDTH_8BIT; | |
2133 | break; | |
2134 | case 16: | |
2135 | gpmc_s.device_width = GPMC_DEVWIDTH_16BIT; | |
2136 | break; | |
2137 | default: | |
c86f9854 RH |
2138 | dev_err(&pdev->dev, "%pOFn: invalid 'nand-bus-width'\n", |
2139 | child); | |
c9711ec5 RQ |
2140 | ret = -EINVAL; |
2141 | goto err; | |
2142 | } | |
2143 | ||
2144 | /* disable write protect */ | |
2145 | gpmc_configure(GPMC_CONFIG_WP, 0); | |
2146 | gpmc_s.device_nand = true; | |
2147 | } else { | |
2148 | ret = of_property_read_u32(child, "bank-width", | |
2149 | &gpmc_s.device_width); | |
c18a7ac3 LM |
2150 | if (ret < 0 && !gpmc_s.device_width) { |
2151 | dev_err(&pdev->dev, | |
2152 | "%pOF has no 'gpmc,device-width' property\n", | |
db749d17 | 2153 | child); |
c9711ec5 | 2154 | goto err; |
c9eabf40 | 2155 | } |
c9711ec5 | 2156 | } |
cdd6928c | 2157 | |
210325f0 RQ |
2158 | /* Reserve wait pin if it is required and valid */ |
2159 | if (gpmc_s.wait_on_read || gpmc_s.wait_on_write) { | |
2160 | unsigned int wait_pin = gpmc_s.wait_pin; | |
2161 | ||
2162 | waitpin_desc = gpiochip_request_own_desc(&gpmc->gpio_chip, | |
21abf103 | 2163 | wait_pin, "WAITPIN", |
5923ea6c LW |
2164 | GPIO_ACTIVE_HIGH, |
2165 | GPIOD_IN); | |
210325f0 RQ |
2166 | if (IS_ERR(waitpin_desc)) { |
2167 | dev_err(&pdev->dev, "invalid wait-pin: %d\n", wait_pin); | |
2168 | ret = PTR_ERR(waitpin_desc); | |
2169 | goto err; | |
2170 | } | |
2171 | } | |
2172 | ||
fd820a1e | 2173 | gpmc_cs_show_timings(cs, "before gpmc_cs_program_settings"); |
210325f0 | 2174 | |
cdd6928c JH |
2175 | ret = gpmc_cs_program_settings(cs, &gpmc_s); |
2176 | if (ret < 0) | |
210325f0 | 2177 | goto err_cs; |
cdd6928c | 2178 | |
2e676901 | 2179 | ret = gpmc_cs_set_timings(cs, &gpmc_t, &gpmc_s); |
7604baf3 | 2180 | if (ret) { |
c86f9854 RH |
2181 | dev_err(&pdev->dev, "failed to set gpmc timings for: %pOFn\n", |
2182 | child); | |
210325f0 | 2183 | goto err_cs; |
7604baf3 | 2184 | } |
cdd6928c | 2185 | |
e378d22b RQ |
2186 | /* Clear limited address i.e. enable A26-A11 */ |
2187 | val = gpmc_read_reg(GPMC_CONFIG); | |
2188 | val &= ~GPMC_CONFIG_LIMITEDADDRESS; | |
2189 | gpmc_write_reg(GPMC_CONFIG, val); | |
2190 | ||
4cf27d2e RQ |
2191 | /* Enable CS region */ |
2192 | gpmc_cs_enable_mem(cs); | |
cdd6928c | 2193 | |
fd4446f2 | 2194 | no_timings: |
b1dc1ca9 RA |
2195 | |
2196 | /* create platform device, NULL on error or when disabled */ | |
2197 | if (!of_platform_device_create(child, NULL, &pdev->dev)) | |
2198 | goto err_child_fail; | |
2199 | ||
2200 | /* is child a common bus? */ | |
2201 | if (of_match_node(of_default_bus_match_table, child)) | |
2202 | /* create children and other common bus children */ | |
9f2c519c | 2203 | if (of_platform_default_populate(child, NULL, &pdev->dev)) |
b1dc1ca9 RA |
2204 | goto err_child_fail; |
2205 | ||
2206 | return 0; | |
2207 | ||
2208 | err_child_fail: | |
cdd6928c | 2209 | |
c86f9854 | 2210 | dev_err(&pdev->dev, "failed to create gpmc child %pOFn\n", child); |
e8ffd6fd | 2211 | ret = -ENODEV; |
cdd6928c | 2212 | |
210325f0 | 2213 | err_cs: |
3f41a3c4 | 2214 | gpiochip_free_own_desc(waitpin_desc); |
cdd6928c JH |
2215 | err: |
2216 | gpmc_cs_free(cs); | |
2217 | ||
2218 | return ret; | |
2219 | } | |
2220 | ||
bc6b1e7b DM |
2221 | static int gpmc_probe_dt(struct platform_device *pdev) |
2222 | { | |
2223 | int ret; | |
bc6b1e7b DM |
2224 | const struct of_device_id *of_id = |
2225 | of_match_device(gpmc_dt_ids, &pdev->dev); | |
2226 | ||
2227 | if (!of_id) | |
2228 | return 0; | |
2229 | ||
f34f3716 GP |
2230 | ret = of_property_read_u32(pdev->dev.of_node, "gpmc,num-cs", |
2231 | &gpmc_cs_num); | |
2232 | if (ret < 0) { | |
2233 | pr_err("%s: number of chip-selects not defined\n", __func__); | |
2234 | return ret; | |
2235 | } else if (gpmc_cs_num < 1) { | |
2236 | pr_err("%s: all chip-selects are disabled\n", __func__); | |
2237 | return -EINVAL; | |
2238 | } else if (gpmc_cs_num > GPMC_CS_NUM) { | |
2239 | pr_err("%s: number of supported chip-selects cannot be > %d\n", | |
2240 | __func__, GPMC_CS_NUM); | |
2241 | return -EINVAL; | |
2242 | } | |
2243 | ||
9f833156 JH |
2244 | ret = of_property_read_u32(pdev->dev.of_node, "gpmc,num-waitpins", |
2245 | &gpmc_nr_waitpins); | |
2246 | if (ret < 0) { | |
2247 | pr_err("%s: number of wait pins not found!\n", __func__); | |
2248 | return ret; | |
2249 | } | |
2250 | ||
d2d00862 RQ |
2251 | return 0; |
2252 | } | |
2253 | ||
23540d6e | 2254 | static void gpmc_probe_dt_children(struct platform_device *pdev) |
d2d00862 RQ |
2255 | { |
2256 | int ret; | |
2257 | struct device_node *child; | |
2258 | ||
68e2eb53 | 2259 | for_each_available_child_of_node(pdev->dev.of_node, child) { |
a758f50f | 2260 | ret = gpmc_probe_generic_child(pdev, child); |
23540d6e | 2261 | if (ret) { |
c86f9854 RH |
2262 | dev_err(&pdev->dev, "failed to probe DT child '%pOFn': %d\n", |
2263 | child, ret); | |
23540d6e | 2264 | } |
5330dc16 | 2265 | } |
bc6b1e7b DM |
2266 | } |
2267 | #else | |
2268 | static int gpmc_probe_dt(struct platform_device *pdev) | |
2269 | { | |
2270 | return 0; | |
2271 | } | |
d2d00862 | 2272 | |
23540d6e | 2273 | static void gpmc_probe_dt_children(struct platform_device *pdev) |
d2d00862 | 2274 | { |
d2d00862 | 2275 | } |
32dd625a RQ |
2276 | #endif /* CONFIG_OF */ |
2277 | ||
2278 | static int gpmc_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) | |
2279 | { | |
2280 | return 1; /* we're input only */ | |
2281 | } | |
2282 | ||
2283 | static int gpmc_gpio_direction_input(struct gpio_chip *chip, | |
2284 | unsigned int offset) | |
2285 | { | |
2286 | return 0; /* we're input only */ | |
2287 | } | |
2288 | ||
2289 | static int gpmc_gpio_direction_output(struct gpio_chip *chip, | |
2290 | unsigned int offset, int value) | |
2291 | { | |
2292 | return -EINVAL; /* we're input only */ | |
2293 | } | |
2294 | ||
2295 | static void gpmc_gpio_set(struct gpio_chip *chip, unsigned int offset, | |
2296 | int value) | |
2297 | { | |
2298 | } | |
2299 | ||
2300 | static int gpmc_gpio_get(struct gpio_chip *chip, unsigned int offset) | |
2301 | { | |
2302 | u32 reg; | |
2303 | ||
2304 | offset += 8; | |
2305 | ||
2306 | reg = gpmc_read_reg(GPMC_STATUS) & BIT(offset); | |
2307 | ||
2308 | return !!reg; | |
2309 | } | |
2310 | ||
2311 | static int gpmc_gpio_init(struct gpmc_device *gpmc) | |
2312 | { | |
2313 | int ret; | |
2314 | ||
2315 | gpmc->gpio_chip.parent = gpmc->dev; | |
2316 | gpmc->gpio_chip.owner = THIS_MODULE; | |
2317 | gpmc->gpio_chip.label = DEVICE_NAME; | |
2318 | gpmc->gpio_chip.ngpio = gpmc_nr_waitpins; | |
2319 | gpmc->gpio_chip.get_direction = gpmc_gpio_get_direction; | |
2320 | gpmc->gpio_chip.direction_input = gpmc_gpio_direction_input; | |
2321 | gpmc->gpio_chip.direction_output = gpmc_gpio_direction_output; | |
2322 | gpmc->gpio_chip.set = gpmc_gpio_set; | |
2323 | gpmc->gpio_chip.get = gpmc_gpio_get; | |
2324 | gpmc->gpio_chip.base = -1; | |
2325 | ||
525fe43f | 2326 | ret = devm_gpiochip_add_data(gpmc->dev, &gpmc->gpio_chip, NULL); |
32dd625a RQ |
2327 | if (ret < 0) { |
2328 | dev_err(gpmc->dev, "could not register gpio chip: %d\n", ret); | |
2329 | return ret; | |
2330 | } | |
2331 | ||
2332 | return 0; | |
2333 | } | |
2334 | ||
351a102d | 2335 | static int gpmc_probe(struct platform_device *pdev) |
4bbbc1ad | 2336 | { |
8119024e | 2337 | int rc; |
6b6c32fc | 2338 | u32 l; |
da496873 | 2339 | struct resource *res; |
384258f2 RQ |
2340 | struct gpmc_device *gpmc; |
2341 | ||
2342 | gpmc = devm_kzalloc(&pdev->dev, sizeof(*gpmc), GFP_KERNEL); | |
2343 | if (!gpmc) | |
2344 | return -ENOMEM; | |
2345 | ||
2346 | gpmc->dev = &pdev->dev; | |
2347 | platform_set_drvdata(pdev, gpmc); | |
4bbbc1ad | 2348 | |
da496873 AM |
2349 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
2350 | if (res == NULL) | |
2351 | return -ENOENT; | |
8d08436d | 2352 | |
da496873 AM |
2353 | phys_base = res->start; |
2354 | mem_size = resource_size(res); | |
fd1dc87d | 2355 | |
5857bd98 TR |
2356 | gpmc_base = devm_ioremap_resource(&pdev->dev, res); |
2357 | if (IS_ERR(gpmc_base)) | |
2358 | return PTR_ERR(gpmc_base); | |
da496873 AM |
2359 | |
2360 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
384258f2 RQ |
2361 | if (!res) { |
2362 | dev_err(&pdev->dev, "Failed to get resource: irq\n"); | |
2363 | return -ENOENT; | |
2364 | } | |
2365 | ||
2366 | gpmc->irq = res->start; | |
da496873 | 2367 | |
8bf9be56 | 2368 | gpmc_l3_clk = devm_clk_get(&pdev->dev, "fck"); |
da496873 | 2369 | if (IS_ERR(gpmc_l3_clk)) { |
8bf9be56 | 2370 | dev_err(&pdev->dev, "Failed to get GPMC fck\n"); |
da496873 | 2371 | return PTR_ERR(gpmc_l3_clk); |
fd1dc87d PW |
2372 | } |
2373 | ||
8bf9be56 RQ |
2374 | if (!clk_get_rate(gpmc_l3_clk)) { |
2375 | dev_err(&pdev->dev, "Invalid GPMC fck clock rate\n"); | |
2376 | return -EINVAL; | |
2377 | } | |
2378 | ||
d2d00862 RQ |
2379 | if (pdev->dev.of_node) { |
2380 | rc = gpmc_probe_dt(pdev); | |
2381 | if (rc) | |
2382 | return rc; | |
2383 | } else { | |
2384 | gpmc_cs_num = GPMC_CS_NUM; | |
2385 | gpmc_nr_waitpins = GPMC_NR_WAITPINS; | |
2386 | } | |
2387 | ||
b3f5525c | 2388 | pm_runtime_enable(&pdev->dev); |
2389 | pm_runtime_get_sync(&pdev->dev); | |
1daa8c1d | 2390 | |
4bbbc1ad | 2391 | l = gpmc_read_reg(GPMC_REVISION); |
aa8d4767 JH |
2392 | |
2393 | /* | |
2394 | * FIXME: Once device-tree migration is complete the below flags | |
2395 | * should be populated based upon the device-tree compatible | |
2396 | * string. For now just use the IP revision. OMAP3+ devices have | |
2397 | * the wr_access and wr_data_mux_bus register fields. OMAP4+ | |
2398 | * devices support the addr-addr-data multiplex protocol. | |
2399 | * | |
2400 | * GPMC IP revisions: | |
2401 | * - OMAP24xx = 2.0 | |
2402 | * - OMAP3xxx = 5.0 | |
2403 | * - OMAP44xx/54xx/AM335x = 6.0 | |
2404 | */ | |
da496873 AM |
2405 | if (GPMC_REVISION_MAJOR(l) > 0x4) |
2406 | gpmc_capability = GPMC_HAS_WR_ACCESS | GPMC_HAS_WR_DATA_MUX_BUS; | |
aa8d4767 JH |
2407 | if (GPMC_REVISION_MAJOR(l) > 0x5) |
2408 | gpmc_capability |= GPMC_HAS_MUX_AAD; | |
384258f2 | 2409 | dev_info(gpmc->dev, "GPMC revision %d.%d\n", GPMC_REVISION_MAJOR(l), |
da496873 AM |
2410 | GPMC_REVISION_MINOR(l)); |
2411 | ||
84b00f0e | 2412 | gpmc_mem_init(); |
d2d00862 RQ |
2413 | rc = gpmc_gpio_init(gpmc); |
2414 | if (rc) | |
2415 | goto gpio_init_failed; | |
db97eb7d | 2416 | |
b2bac25a | 2417 | gpmc->nirqs = GPMC_NR_NAND_IRQS + gpmc_nr_waitpins; |
384258f2 RQ |
2418 | rc = gpmc_setup_irq(gpmc); |
2419 | if (rc) { | |
2420 | dev_err(gpmc->dev, "gpmc_setup_irq failed\n"); | |
525fe43f | 2421 | goto gpio_init_failed; |
384258f2 | 2422 | } |
da496873 | 2423 | |
23540d6e | 2424 | gpmc_probe_dt_children(pdev); |
bc6b1e7b | 2425 | |
da496873 | 2426 | return 0; |
384258f2 | 2427 | |
d2d00862 RQ |
2428 | gpio_init_failed: |
2429 | gpmc_mem_exit(); | |
384258f2 | 2430 | pm_runtime_put_sync(&pdev->dev); |
d2d00862 RQ |
2431 | pm_runtime_disable(&pdev->dev); |
2432 | ||
384258f2 | 2433 | return rc; |
da496873 AM |
2434 | } |
2435 | ||
351a102d | 2436 | static int gpmc_remove(struct platform_device *pdev) |
da496873 | 2437 | { |
384258f2 RQ |
2438 | struct gpmc_device *gpmc = platform_get_drvdata(pdev); |
2439 | ||
2440 | gpmc_free_irq(gpmc); | |
da496873 | 2441 | gpmc_mem_exit(); |
b3f5525c | 2442 | pm_runtime_put_sync(&pdev->dev); |
2443 | pm_runtime_disable(&pdev->dev); | |
384258f2 | 2444 | |
da496873 AM |
2445 | return 0; |
2446 | } | |
2447 | ||
b536dd41 | 2448 | #ifdef CONFIG_PM_SLEEP |
2449 | static int gpmc_suspend(struct device *dev) | |
2450 | { | |
2451 | omap3_gpmc_save_context(); | |
2452 | pm_runtime_put_sync(dev); | |
2453 | return 0; | |
2454 | } | |
2455 | ||
2456 | static int gpmc_resume(struct device *dev) | |
2457 | { | |
2458 | pm_runtime_get_sync(dev); | |
2459 | omap3_gpmc_restore_context(); | |
2460 | return 0; | |
2461 | } | |
2462 | #endif | |
2463 | ||
2464 | static SIMPLE_DEV_PM_OPS(gpmc_pm_ops, gpmc_suspend, gpmc_resume); | |
2465 | ||
da496873 AM |
2466 | static struct platform_driver gpmc_driver = { |
2467 | .probe = gpmc_probe, | |
351a102d | 2468 | .remove = gpmc_remove, |
da496873 AM |
2469 | .driver = { |
2470 | .name = DEVICE_NAME, | |
bc6b1e7b | 2471 | .of_match_table = of_match_ptr(gpmc_dt_ids), |
b536dd41 | 2472 | .pm = &gpmc_pm_ops, |
da496873 AM |
2473 | }, |
2474 | }; | |
2475 | ||
2476 | static __init int gpmc_init(void) | |
2477 | { | |
2478 | return platform_driver_register(&gpmc_driver); | |
2479 | } | |
a8612809 | 2480 | postcore_initcall(gpmc_init); |
db97eb7d | 2481 | |
a2d3e7ba RN |
2482 | static struct omap3_gpmc_regs gpmc_context; |
2483 | ||
b2fa3b7c | 2484 | void omap3_gpmc_save_context(void) |
a2d3e7ba RN |
2485 | { |
2486 | int i; | |
b2fa3b7c | 2487 | |
e984a179 TV |
2488 | if (!gpmc_base) |
2489 | return; | |
2490 | ||
a2d3e7ba RN |
2491 | gpmc_context.sysconfig = gpmc_read_reg(GPMC_SYSCONFIG); |
2492 | gpmc_context.irqenable = gpmc_read_reg(GPMC_IRQENABLE); | |
2493 | gpmc_context.timeout_ctrl = gpmc_read_reg(GPMC_TIMEOUT_CONTROL); | |
2494 | gpmc_context.config = gpmc_read_reg(GPMC_CONFIG); | |
2495 | gpmc_context.prefetch_config1 = gpmc_read_reg(GPMC_PREFETCH_CONFIG1); | |
2496 | gpmc_context.prefetch_config2 = gpmc_read_reg(GPMC_PREFETCH_CONFIG2); | |
2497 | gpmc_context.prefetch_control = gpmc_read_reg(GPMC_PREFETCH_CONTROL); | |
f34f3716 | 2498 | for (i = 0; i < gpmc_cs_num; i++) { |
a2d3e7ba RN |
2499 | gpmc_context.cs_context[i].is_valid = gpmc_cs_mem_enabled(i); |
2500 | if (gpmc_context.cs_context[i].is_valid) { | |
2501 | gpmc_context.cs_context[i].config1 = | |
2502 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG1); | |
2503 | gpmc_context.cs_context[i].config2 = | |
2504 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG2); | |
2505 | gpmc_context.cs_context[i].config3 = | |
2506 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG3); | |
2507 | gpmc_context.cs_context[i].config4 = | |
2508 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG4); | |
2509 | gpmc_context.cs_context[i].config5 = | |
2510 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG5); | |
2511 | gpmc_context.cs_context[i].config6 = | |
2512 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG6); | |
2513 | gpmc_context.cs_context[i].config7 = | |
2514 | gpmc_cs_read_reg(i, GPMC_CS_CONFIG7); | |
2515 | } | |
2516 | } | |
2517 | } | |
2518 | ||
b2fa3b7c | 2519 | void omap3_gpmc_restore_context(void) |
a2d3e7ba RN |
2520 | { |
2521 | int i; | |
b2fa3b7c | 2522 | |
e984a179 TV |
2523 | if (!gpmc_base) |
2524 | return; | |
2525 | ||
a2d3e7ba RN |
2526 | gpmc_write_reg(GPMC_SYSCONFIG, gpmc_context.sysconfig); |
2527 | gpmc_write_reg(GPMC_IRQENABLE, gpmc_context.irqenable); | |
2528 | gpmc_write_reg(GPMC_TIMEOUT_CONTROL, gpmc_context.timeout_ctrl); | |
2529 | gpmc_write_reg(GPMC_CONFIG, gpmc_context.config); | |
2530 | gpmc_write_reg(GPMC_PREFETCH_CONFIG1, gpmc_context.prefetch_config1); | |
2531 | gpmc_write_reg(GPMC_PREFETCH_CONFIG2, gpmc_context.prefetch_config2); | |
2532 | gpmc_write_reg(GPMC_PREFETCH_CONTROL, gpmc_context.prefetch_control); | |
f34f3716 | 2533 | for (i = 0; i < gpmc_cs_num; i++) { |
a2d3e7ba RN |
2534 | if (gpmc_context.cs_context[i].is_valid) { |
2535 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG1, | |
2536 | gpmc_context.cs_context[i].config1); | |
2537 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG2, | |
2538 | gpmc_context.cs_context[i].config2); | |
2539 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG3, | |
2540 | gpmc_context.cs_context[i].config3); | |
2541 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG4, | |
2542 | gpmc_context.cs_context[i].config4); | |
2543 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG5, | |
2544 | gpmc_context.cs_context[i].config5); | |
2545 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG6, | |
2546 | gpmc_context.cs_context[i].config6); | |
2547 | gpmc_cs_write_reg(i, GPMC_CS_CONFIG7, | |
2548 | gpmc_context.cs_context[i].config7); | |
2549 | } | |
2550 | } | |
2551 | } |