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1da177e4 LT |
1 | /* |
2 | * Sharp SL-C7xx Series PCMCIA routines | |
3 | * | |
4 | * Copyright (c) 2004-2005 Richard Purdie | |
5 | * | |
6 | * Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/errno.h> | |
18 | #include <linux/interrupt.h> | |
d052d1be | 19 | #include <linux/platform_device.h> |
1da177e4 | 20 | |
77bb86a1 | 21 | #include <asm/mach-types.h> |
1da177e4 LT |
22 | #include <asm/hardware.h> |
23 | #include <asm/irq.h> | |
1da177e4 | 24 | #include <asm/hardware/scoop.h> |
77bb86a1 PM |
25 | #ifdef CONFIG_SA1100_COLLIE |
26 | #include <asm/arch-sa1100/collie.h> | |
27 | #else | |
28 | #include <asm/arch-pxa/pxa-regs.h> | |
29 | #endif | |
1da177e4 LT |
30 | |
31 | #include "soc_common.h" | |
32 | ||
33 | #define NO_KEEP_VS 0x0001 | |
34 | ||
0ce7625f | 35 | static void sharpsl_pcmcia_init_reset(struct scoop_pcmcia_dev *scoopdev) |
1da177e4 | 36 | { |
0ce7625f RP |
37 | reset_scoop(scoopdev->dev); |
38 | scoopdev->keep_vs = NO_KEEP_VS; | |
39 | scoopdev->keep_rd = 0; | |
1da177e4 LT |
40 | } |
41 | ||
42 | static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt) | |
43 | { | |
44 | int ret; | |
45 | ||
77bb86a1 | 46 | #ifndef CONFIG_SA1100_COLLIE |
1da177e4 LT |
47 | /* |
48 | * Setup default state of GPIO outputs | |
49 | * before we enable them as outputs. | |
50 | */ | |
51 | GPSR(GPIO48_nPOE) = | |
52 | GPIO_bit(GPIO48_nPOE) | | |
53 | GPIO_bit(GPIO49_nPWE) | | |
54 | GPIO_bit(GPIO50_nPIOR) | | |
55 | GPIO_bit(GPIO51_nPIOW) | | |
56 | GPIO_bit(GPIO52_nPCE_1) | | |
57 | GPIO_bit(GPIO53_nPCE_2); | |
58 | ||
59 | pxa_gpio_mode(GPIO48_nPOE_MD); | |
60 | pxa_gpio_mode(GPIO49_nPWE_MD); | |
61 | pxa_gpio_mode(GPIO50_nPIOR_MD); | |
62 | pxa_gpio_mode(GPIO51_nPIOW_MD); | |
63 | pxa_gpio_mode(GPIO52_nPCE_1_MD); | |
64 | pxa_gpio_mode(GPIO53_nPCE_2_MD); | |
65 | pxa_gpio_mode(GPIO54_pSKTSEL_MD); | |
66 | pxa_gpio_mode(GPIO55_nPREG_MD); | |
67 | pxa_gpio_mode(GPIO56_nPWAIT_MD); | |
68 | pxa_gpio_mode(GPIO57_nIOIS16_MD); | |
77bb86a1 | 69 | #endif |
1da177e4 LT |
70 | |
71 | /* Register interrupts */ | |
0ce7625f RP |
72 | if (scoop_devs[skt->nr].cd_irq >= 0) { |
73 | struct pcmcia_irqs cd_irq; | |
74 | ||
75 | cd_irq.sock = skt->nr; | |
76 | cd_irq.irq = scoop_devs[skt->nr].cd_irq; | |
77 | cd_irq.str = scoop_devs[skt->nr].cd_irq_str; | |
78 | ret = soc_pcmcia_request_irqs(skt, &cd_irq, 1); | |
79 | ||
80 | if (ret) { | |
81 | printk(KERN_ERR "Request for Compact Flash IRQ failed\n"); | |
82 | return ret; | |
83 | } | |
1da177e4 LT |
84 | } |
85 | ||
0ce7625f | 86 | skt->irq = scoop_devs[skt->nr].irq; |
1da177e4 LT |
87 | |
88 | return 0; | |
89 | } | |
90 | ||
91 | static void sharpsl_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) | |
92 | { | |
0ce7625f RP |
93 | if (scoop_devs[skt->nr].cd_irq >= 0) { |
94 | struct pcmcia_irqs cd_irq; | |
1da177e4 | 95 | |
0ce7625f RP |
96 | cd_irq.sock = skt->nr; |
97 | cd_irq.irq = scoop_devs[skt->nr].cd_irq; | |
98 | cd_irq.str = scoop_devs[skt->nr].cd_irq_str; | |
99 | soc_pcmcia_free_irqs(skt, &cd_irq, 1); | |
100 | } | |
1da177e4 LT |
101 | } |
102 | ||
103 | ||
104 | static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt, | |
105 | struct pcmcia_state *state) | |
106 | { | |
107 | unsigned short cpr, csr; | |
0ce7625f | 108 | struct device *scoop = scoop_devs[skt->nr].dev; |
1da177e4 | 109 | |
0ce7625f | 110 | cpr = read_scoop_reg(scoop_devs[skt->nr].dev, SCOOP_CPR); |
1da177e4 | 111 | |
0ce7625f RP |
112 | write_scoop_reg(scoop, SCOOP_IRM, 0x00FF); |
113 | write_scoop_reg(scoop, SCOOP_ISR, 0x0000); | |
114 | write_scoop_reg(scoop, SCOOP_IRM, 0x0000); | |
115 | csr = read_scoop_reg(scoop, SCOOP_CSR); | |
1da177e4 LT |
116 | if (csr & 0x0004) { |
117 | /* card eject */ | |
0ce7625f RP |
118 | write_scoop_reg(scoop, SCOOP_CDR, 0x0000); |
119 | scoop_devs[skt->nr].keep_vs = NO_KEEP_VS; | |
1da177e4 | 120 | } |
0ce7625f | 121 | else if (!(scoop_devs[skt->nr].keep_vs & NO_KEEP_VS)) { |
1da177e4 | 122 | /* keep vs1,vs2 */ |
0ce7625f RP |
123 | write_scoop_reg(scoop, SCOOP_CDR, 0x0000); |
124 | csr |= scoop_devs[skt->nr].keep_vs; | |
1da177e4 LT |
125 | } |
126 | else if (cpr & 0x0003) { | |
127 | /* power on */ | |
0ce7625f RP |
128 | write_scoop_reg(scoop, SCOOP_CDR, 0x0000); |
129 | scoop_devs[skt->nr].keep_vs = (csr & 0x00C0); | |
1da177e4 LT |
130 | } |
131 | else { | |
132 | /* card detect */ | |
0ce7625f | 133 | write_scoop_reg(scoop, SCOOP_CDR, 0x0002); |
1da177e4 LT |
134 | } |
135 | ||
136 | state->detect = (csr & 0x0004) ? 0 : 1; | |
137 | state->ready = (csr & 0x0002) ? 1 : 0; | |
138 | state->bvd1 = (csr & 0x0010) ? 1 : 0; | |
139 | state->bvd2 = (csr & 0x0020) ? 1 : 0; | |
140 | state->wrprot = (csr & 0x0008) ? 1 : 0; | |
141 | state->vs_3v = (csr & 0x0040) ? 0 : 1; | |
142 | state->vs_Xv = (csr & 0x0080) ? 0 : 1; | |
143 | ||
144 | if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) { | |
145 | printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr); | |
146 | } | |
147 | ||
148 | } | |
149 | ||
150 | ||
151 | static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, | |
152 | const socket_state_t *state) | |
153 | { | |
154 | unsigned long flags; | |
0ce7625f | 155 | struct device *scoop = scoop_devs[skt->nr].dev; |
1da177e4 LT |
156 | |
157 | unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr; | |
158 | ||
159 | switch (state->Vcc) { | |
160 | case 0: break; | |
161 | case 33: break; | |
162 | case 50: break; | |
163 | default: | |
164 | printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc); | |
165 | return -1; | |
166 | } | |
167 | ||
168 | if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) { | |
169 | printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp); | |
170 | return -1; | |
171 | } | |
172 | ||
173 | local_irq_save(flags); | |
174 | ||
0ce7625f RP |
175 | nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010; |
176 | ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083; | |
177 | nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080; | |
178 | nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E; | |
1da177e4 LT |
179 | |
180 | ncpr |= (state->Vcc == 33) ? 0x0001 : | |
181 | (state->Vcc == 50) ? 0x0002 : 0; | |
182 | nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0; | |
183 | ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0; | |
184 | nccr |= (state->flags&SS_RESET)? 0x0080: 0; | |
185 | nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)| | |
186 | ((skt->status&SS_READY) ? 0x0002 : 0)| | |
187 | ((skt->status&SS_BATDEAD)? 0x0010 : 0)| | |
188 | ((skt->status&SS_BATWARN)? 0x0020 : 0)| | |
189 | ((skt->status&SS_STSCHG) ? 0x0010 : 0)| | |
190 | ((skt->status&SS_WRPROT) ? 0x0008 : 0); | |
191 | ||
192 | if (!(ncpr & 0x0003)) { | |
0ce7625f RP |
193 | scoop_devs[skt->nr].keep_rd = 0; |
194 | } else if (!scoop_devs[skt->nr].keep_rd) { | |
1da177e4 | 195 | if (nccr & 0x0080) |
0ce7625f | 196 | scoop_devs[skt->nr].keep_rd = 1; |
1da177e4 LT |
197 | else |
198 | nccr |= 0x0080; | |
199 | } | |
200 | ||
201 | if (mcr != nmcr) | |
0ce7625f | 202 | write_scoop_reg(scoop, SCOOP_MCR, nmcr); |
1da177e4 | 203 | if (cpr != ncpr) |
0ce7625f | 204 | write_scoop_reg(scoop, SCOOP_CPR, ncpr); |
1da177e4 | 205 | if (ccr != nccr) |
0ce7625f | 206 | write_scoop_reg(scoop, SCOOP_CCR, nccr); |
1da177e4 | 207 | if (imr != nimr) |
0ce7625f | 208 | write_scoop_reg(scoop, SCOOP_IMR, nimr); |
1da177e4 LT |
209 | |
210 | local_irq_restore(flags); | |
211 | ||
212 | return 0; | |
213 | } | |
214 | ||
215 | static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt) | |
216 | { | |
0ce7625f RP |
217 | sharpsl_pcmcia_init_reset(&scoop_devs[skt->nr]); |
218 | ||
219 | /* Enable interrupt */ | |
220 | write_scoop_reg(scoop_devs[skt->nr].dev, SCOOP_IMR, 0x00C0); | |
221 | write_scoop_reg(scoop_devs[skt->nr].dev, SCOOP_MCR, 0x0101); | |
222 | scoop_devs[skt->nr].keep_vs = NO_KEEP_VS; | |
77bb86a1 PM |
223 | |
224 | if (machine_is_collie()) | |
225 | /* We need to disable SS_OUTPUT_ENA here. */ | |
226 | write_scoop_reg(scoop_devs[skt->nr].dev, SCOOP_CPR, read_scoop_reg(scoop_devs[skt->nr].dev, SCOOP_CPR) & ~0x0080); | |
1da177e4 LT |
227 | } |
228 | ||
229 | static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) | |
230 | { | |
0ce7625f RP |
231 | /* CF_BUS_OFF */ |
232 | sharpsl_pcmcia_init_reset(&scoop_devs[skt->nr]); | |
77bb86a1 PM |
233 | |
234 | if (machine_is_collie()) | |
235 | /* We need to disable SS_OUTPUT_ENA here. */ | |
236 | write_scoop_reg(scoop_devs[skt->nr].dev, SCOOP_CPR, read_scoop_reg(scoop_devs[skt->nr].dev, SCOOP_CPR) & ~0x0080); | |
1da177e4 LT |
237 | } |
238 | ||
239 | static struct pcmcia_low_level sharpsl_pcmcia_ops = { | |
240 | .owner = THIS_MODULE, | |
241 | .hw_init = sharpsl_pcmcia_hw_init, | |
242 | .hw_shutdown = sharpsl_pcmcia_hw_shutdown, | |
243 | .socket_state = sharpsl_pcmcia_socket_state, | |
244 | .configure_socket = sharpsl_pcmcia_configure_socket, | |
245 | .socket_init = sharpsl_pcmcia_socket_init, | |
246 | .socket_suspend = sharpsl_pcmcia_socket_suspend, | |
247 | .first = 0, | |
0ce7625f | 248 | .nr = 0, |
1da177e4 LT |
249 | }; |
250 | ||
251 | static struct platform_device *sharpsl_pcmcia_device; | |
252 | ||
77bb86a1 PM |
253 | #ifdef CONFIG_SA1100_COLLIE |
254 | int __init pcmcia_collie_init(struct device *dev) | |
255 | { | |
256 | int ret = -ENODEV; | |
257 | ||
258 | if (machine_is_collie()) | |
259 | ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1); | |
260 | ||
261 | return ret; | |
262 | } | |
263 | ||
264 | #else | |
265 | ||
1da177e4 LT |
266 | static int __init sharpsl_pcmcia_init(void) |
267 | { | |
268 | int ret; | |
269 | ||
0ce7625f | 270 | sharpsl_pcmcia_ops.nr=scoop_num; |
1da177e4 LT |
271 | sharpsl_pcmcia_device = kmalloc(sizeof(*sharpsl_pcmcia_device), GFP_KERNEL); |
272 | if (!sharpsl_pcmcia_device) | |
273 | return -ENOMEM; | |
0ce7625f | 274 | |
1da177e4 LT |
275 | memset(sharpsl_pcmcia_device, 0, sizeof(*sharpsl_pcmcia_device)); |
276 | sharpsl_pcmcia_device->name = "pxa2xx-pcmcia"; | |
277 | sharpsl_pcmcia_device->dev.platform_data = &sharpsl_pcmcia_ops; | |
0ce7625f | 278 | sharpsl_pcmcia_device->dev.parent=scoop_devs[0].dev; |
1da177e4 LT |
279 | |
280 | ret = platform_device_register(sharpsl_pcmcia_device); | |
281 | if (ret) | |
282 | kfree(sharpsl_pcmcia_device); | |
283 | ||
284 | return ret; | |
285 | } | |
286 | ||
287 | static void __exit sharpsl_pcmcia_exit(void) | |
288 | { | |
289 | /* | |
290 | * This call is supposed to free our sharpsl_pcmcia_device. | |
291 | * Unfortunately platform_device don't have a free method, and | |
292 | * we can't assume it's free of any reference at this point so we | |
293 | * can't free it either. | |
294 | */ | |
295 | platform_device_unregister(sharpsl_pcmcia_device); | |
296 | } | |
297 | ||
f36598ae | 298 | fs_initcall(sharpsl_pcmcia_init); |
1da177e4 | 299 | module_exit(sharpsl_pcmcia_exit); |
77bb86a1 | 300 | #endif |
1da177e4 LT |
301 | |
302 | MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support"); | |
303 | MODULE_LICENSE("GPL"); |