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e3b3d0f5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
161e773c RW |
2 | /* |
3 | * Drivers for CSR SiRFprimaII onboard UARTs. | |
4 | * | |
5 | * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company. | |
6 | * | |
7 | * Licensed under GPLv2 or later. | |
8 | */ | |
9 | #include <linux/bitops.h> | |
cb4595a2 | 10 | #include <linux/log2.h> |
0f17e3b4 | 11 | #include <linux/hrtimer.h> |
5df83111 QL |
12 | struct sirfsoc_uart_param { |
13 | const char *uart_name; | |
14 | const char *port_name; | |
5df83111 QL |
15 | }; |
16 | ||
17 | struct sirfsoc_register { | |
18 | /* hardware uart specific */ | |
19 | u32 sirfsoc_line_ctrl; | |
20 | u32 sirfsoc_divisor; | |
21 | /* uart - usp common */ | |
22 | u32 sirfsoc_tx_rx_en; | |
23 | u32 sirfsoc_int_en_reg; | |
24 | u32 sirfsoc_int_st_reg; | |
c1b7ac6f | 25 | u32 sirfsoc_int_en_clr_reg; |
5df83111 QL |
26 | u32 sirfsoc_tx_dma_io_ctrl; |
27 | u32 sirfsoc_tx_dma_io_len; | |
28 | u32 sirfsoc_tx_fifo_ctrl; | |
29 | u32 sirfsoc_tx_fifo_level_chk; | |
30 | u32 sirfsoc_tx_fifo_op; | |
31 | u32 sirfsoc_tx_fifo_status; | |
32 | u32 sirfsoc_tx_fifo_data; | |
33 | u32 sirfsoc_rx_dma_io_ctrl; | |
34 | u32 sirfsoc_rx_dma_io_len; | |
35 | u32 sirfsoc_rx_fifo_ctrl; | |
36 | u32 sirfsoc_rx_fifo_level_chk; | |
37 | u32 sirfsoc_rx_fifo_op; | |
38 | u32 sirfsoc_rx_fifo_status; | |
39 | u32 sirfsoc_rx_fifo_data; | |
40 | u32 sirfsoc_afc_ctrl; | |
41 | u32 sirfsoc_swh_dma_io; | |
42 | /* hardware usp specific */ | |
43 | u32 sirfsoc_mode1; | |
44 | u32 sirfsoc_mode2; | |
45 | u32 sirfsoc_tx_frame_ctrl; | |
46 | u32 sirfsoc_rx_frame_ctrl; | |
47 | u32 sirfsoc_async_param_reg; | |
48 | }; | |
49 | ||
cb4595a2 QL |
50 | typedef u32 (*fifo_full_mask)(struct uart_port *port); |
51 | typedef u32 (*fifo_empty_mask)(struct uart_port *port); | |
5df83111 QL |
52 | |
53 | struct sirfsoc_fifo_status { | |
54 | fifo_full_mask ff_full; | |
55 | fifo_empty_mask ff_empty; | |
56 | }; | |
57 | ||
58 | struct sirfsoc_int_en { | |
59 | u32 sirfsoc_rx_done_en; | |
60 | u32 sirfsoc_tx_done_en; | |
61 | u32 sirfsoc_rx_oflow_en; | |
62 | u32 sirfsoc_tx_allout_en; | |
63 | u32 sirfsoc_rx_io_dma_en; | |
64 | u32 sirfsoc_tx_io_dma_en; | |
65 | u32 sirfsoc_rxfifo_full_en; | |
66 | u32 sirfsoc_txfifo_empty_en; | |
67 | u32 sirfsoc_rxfifo_thd_en; | |
68 | u32 sirfsoc_txfifo_thd_en; | |
69 | u32 sirfsoc_frm_err_en; | |
70 | u32 sirfsoc_rxd_brk_en; | |
71 | u32 sirfsoc_rx_timeout_en; | |
72 | u32 sirfsoc_parity_err_en; | |
73 | u32 sirfsoc_cts_en; | |
74 | u32 sirfsoc_rts_en; | |
75 | }; | |
76 | ||
77 | struct sirfsoc_int_status { | |
78 | u32 sirfsoc_rx_done; | |
79 | u32 sirfsoc_tx_done; | |
80 | u32 sirfsoc_rx_oflow; | |
81 | u32 sirfsoc_tx_allout; | |
82 | u32 sirfsoc_rx_io_dma; | |
83 | u32 sirfsoc_tx_io_dma; | |
84 | u32 sirfsoc_rxfifo_full; | |
85 | u32 sirfsoc_txfifo_empty; | |
86 | u32 sirfsoc_rxfifo_thd; | |
87 | u32 sirfsoc_txfifo_thd; | |
88 | u32 sirfsoc_frm_err; | |
89 | u32 sirfsoc_rxd_brk; | |
90 | u32 sirfsoc_rx_timeout; | |
91 | u32 sirfsoc_parity_err; | |
92 | u32 sirfsoc_cts; | |
93 | u32 sirfsoc_rts; | |
94 | }; | |
95 | ||
96 | enum sirfsoc_uart_type { | |
97 | SIRF_REAL_UART, | |
98 | SIRF_USP_UART, | |
99 | }; | |
100 | ||
101 | struct sirfsoc_uart_register { | |
102 | struct sirfsoc_register uart_reg; | |
103 | struct sirfsoc_int_en uart_int_en; | |
104 | struct sirfsoc_int_status uart_int_st; | |
105 | struct sirfsoc_fifo_status fifo_status; | |
106 | struct sirfsoc_uart_param uart_param; | |
107 | enum sirfsoc_uart_type uart_type; | |
108 | }; | |
161e773c | 109 | |
3548e45c | 110 | static u32 uart_usp_ff_full_mask(struct uart_port *port) |
5df83111 | 111 | { |
cb4595a2 QL |
112 | u32 full_bit; |
113 | ||
114 | full_bit = ilog2(port->fifosize); | |
115 | return (1 << full_bit); | |
5df83111 | 116 | } |
cb4595a2 | 117 | |
3548e45c | 118 | static u32 uart_usp_ff_empty_mask(struct uart_port *port) |
5df83111 | 119 | { |
cb4595a2 QL |
120 | u32 empty_bit; |
121 | ||
86459b0e | 122 | empty_bit = ilog2(port->fifosize) + 1; |
cb4595a2 | 123 | return (1 << empty_bit); |
5df83111 QL |
124 | } |
125 | struct sirfsoc_uart_register sirfsoc_usp = { | |
126 | .uart_reg = { | |
127 | .sirfsoc_mode1 = 0x0000, | |
128 | .sirfsoc_mode2 = 0x0004, | |
129 | .sirfsoc_tx_frame_ctrl = 0x0008, | |
130 | .sirfsoc_rx_frame_ctrl = 0x000c, | |
131 | .sirfsoc_tx_rx_en = 0x0010, | |
132 | .sirfsoc_int_en_reg = 0x0014, | |
133 | .sirfsoc_int_st_reg = 0x0018, | |
134 | .sirfsoc_async_param_reg = 0x0024, | |
135 | .sirfsoc_tx_dma_io_ctrl = 0x0100, | |
136 | .sirfsoc_tx_dma_io_len = 0x0104, | |
137 | .sirfsoc_tx_fifo_ctrl = 0x0108, | |
138 | .sirfsoc_tx_fifo_level_chk = 0x010c, | |
139 | .sirfsoc_tx_fifo_op = 0x0110, | |
140 | .sirfsoc_tx_fifo_status = 0x0114, | |
141 | .sirfsoc_tx_fifo_data = 0x0118, | |
142 | .sirfsoc_rx_dma_io_ctrl = 0x0120, | |
143 | .sirfsoc_rx_dma_io_len = 0x0124, | |
144 | .sirfsoc_rx_fifo_ctrl = 0x0128, | |
145 | .sirfsoc_rx_fifo_level_chk = 0x012c, | |
146 | .sirfsoc_rx_fifo_op = 0x0130, | |
147 | .sirfsoc_rx_fifo_status = 0x0134, | |
148 | .sirfsoc_rx_fifo_data = 0x0138, | |
c1b7ac6f | 149 | .sirfsoc_int_en_clr_reg = 0x140, |
5df83111 QL |
150 | }, |
151 | .uart_int_en = { | |
152 | .sirfsoc_rx_done_en = BIT(0), | |
153 | .sirfsoc_tx_done_en = BIT(1), | |
154 | .sirfsoc_rx_oflow_en = BIT(2), | |
155 | .sirfsoc_tx_allout_en = BIT(3), | |
156 | .sirfsoc_rx_io_dma_en = BIT(4), | |
157 | .sirfsoc_tx_io_dma_en = BIT(5), | |
158 | .sirfsoc_rxfifo_full_en = BIT(6), | |
159 | .sirfsoc_txfifo_empty_en = BIT(7), | |
160 | .sirfsoc_rxfifo_thd_en = BIT(8), | |
161 | .sirfsoc_txfifo_thd_en = BIT(9), | |
162 | .sirfsoc_frm_err_en = BIT(10), | |
163 | .sirfsoc_rx_timeout_en = BIT(11), | |
164 | .sirfsoc_rxd_brk_en = BIT(15), | |
165 | }, | |
166 | .uart_int_st = { | |
167 | .sirfsoc_rx_done = BIT(0), | |
168 | .sirfsoc_tx_done = BIT(1), | |
169 | .sirfsoc_rx_oflow = BIT(2), | |
170 | .sirfsoc_tx_allout = BIT(3), | |
171 | .sirfsoc_rx_io_dma = BIT(4), | |
172 | .sirfsoc_tx_io_dma = BIT(5), | |
173 | .sirfsoc_rxfifo_full = BIT(6), | |
174 | .sirfsoc_txfifo_empty = BIT(7), | |
175 | .sirfsoc_rxfifo_thd = BIT(8), | |
176 | .sirfsoc_txfifo_thd = BIT(9), | |
177 | .sirfsoc_frm_err = BIT(10), | |
178 | .sirfsoc_rx_timeout = BIT(11), | |
179 | .sirfsoc_rxd_brk = BIT(15), | |
180 | }, | |
181 | .fifo_status = { | |
cb4595a2 QL |
182 | .ff_full = uart_usp_ff_full_mask, |
183 | .ff_empty = uart_usp_ff_empty_mask, | |
5df83111 QL |
184 | }, |
185 | .uart_param = { | |
186 | .uart_name = "ttySiRF", | |
187 | .port_name = "sirfsoc-uart", | |
5df83111 QL |
188 | }, |
189 | }; | |
190 | ||
191 | struct sirfsoc_uart_register sirfsoc_uart = { | |
192 | .uart_reg = { | |
193 | .sirfsoc_line_ctrl = 0x0040, | |
194 | .sirfsoc_tx_rx_en = 0x004c, | |
195 | .sirfsoc_divisor = 0x0050, | |
196 | .sirfsoc_int_en_reg = 0x0054, | |
197 | .sirfsoc_int_st_reg = 0x0058, | |
c1b7ac6f | 198 | .sirfsoc_int_en_clr_reg = 0x0060, |
5df83111 QL |
199 | .sirfsoc_tx_dma_io_ctrl = 0x0100, |
200 | .sirfsoc_tx_dma_io_len = 0x0104, | |
201 | .sirfsoc_tx_fifo_ctrl = 0x0108, | |
202 | .sirfsoc_tx_fifo_level_chk = 0x010c, | |
203 | .sirfsoc_tx_fifo_op = 0x0110, | |
204 | .sirfsoc_tx_fifo_status = 0x0114, | |
205 | .sirfsoc_tx_fifo_data = 0x0118, | |
206 | .sirfsoc_rx_dma_io_ctrl = 0x0120, | |
207 | .sirfsoc_rx_dma_io_len = 0x0124, | |
208 | .sirfsoc_rx_fifo_ctrl = 0x0128, | |
209 | .sirfsoc_rx_fifo_level_chk = 0x012c, | |
210 | .sirfsoc_rx_fifo_op = 0x0130, | |
211 | .sirfsoc_rx_fifo_status = 0x0134, | |
212 | .sirfsoc_rx_fifo_data = 0x0138, | |
213 | .sirfsoc_afc_ctrl = 0x0140, | |
214 | .sirfsoc_swh_dma_io = 0x0148, | |
215 | }, | |
216 | .uart_int_en = { | |
217 | .sirfsoc_rx_done_en = BIT(0), | |
218 | .sirfsoc_tx_done_en = BIT(1), | |
219 | .sirfsoc_rx_oflow_en = BIT(2), | |
220 | .sirfsoc_tx_allout_en = BIT(3), | |
221 | .sirfsoc_rx_io_dma_en = BIT(4), | |
222 | .sirfsoc_tx_io_dma_en = BIT(5), | |
223 | .sirfsoc_rxfifo_full_en = BIT(6), | |
224 | .sirfsoc_txfifo_empty_en = BIT(7), | |
225 | .sirfsoc_rxfifo_thd_en = BIT(8), | |
226 | .sirfsoc_txfifo_thd_en = BIT(9), | |
227 | .sirfsoc_frm_err_en = BIT(10), | |
228 | .sirfsoc_rxd_brk_en = BIT(11), | |
229 | .sirfsoc_rx_timeout_en = BIT(12), | |
230 | .sirfsoc_parity_err_en = BIT(13), | |
231 | .sirfsoc_cts_en = BIT(14), | |
232 | .sirfsoc_rts_en = BIT(15), | |
233 | }, | |
234 | .uart_int_st = { | |
235 | .sirfsoc_rx_done = BIT(0), | |
236 | .sirfsoc_tx_done = BIT(1), | |
237 | .sirfsoc_rx_oflow = BIT(2), | |
238 | .sirfsoc_tx_allout = BIT(3), | |
239 | .sirfsoc_rx_io_dma = BIT(4), | |
240 | .sirfsoc_tx_io_dma = BIT(5), | |
241 | .sirfsoc_rxfifo_full = BIT(6), | |
242 | .sirfsoc_txfifo_empty = BIT(7), | |
243 | .sirfsoc_rxfifo_thd = BIT(8), | |
244 | .sirfsoc_txfifo_thd = BIT(9), | |
245 | .sirfsoc_frm_err = BIT(10), | |
246 | .sirfsoc_rxd_brk = BIT(11), | |
247 | .sirfsoc_rx_timeout = BIT(12), | |
248 | .sirfsoc_parity_err = BIT(13), | |
249 | .sirfsoc_cts = BIT(14), | |
250 | .sirfsoc_rts = BIT(15), | |
251 | }, | |
252 | .fifo_status = { | |
cb4595a2 QL |
253 | .ff_full = uart_usp_ff_full_mask, |
254 | .ff_empty = uart_usp_ff_empty_mask, | |
5df83111 QL |
255 | }, |
256 | .uart_param = { | |
257 | .uart_name = "ttySiRF", | |
258 | .port_name = "sirfsoc_uart", | |
5df83111 QL |
259 | }, |
260 | }; | |
261 | /* uart io ctrl */ | |
161e773c RW |
262 | #define SIRFUART_DATA_BIT_LEN_MASK 0x3 |
263 | #define SIRFUART_DATA_BIT_LEN_5 BIT(0) | |
264 | #define SIRFUART_DATA_BIT_LEN_6 1 | |
265 | #define SIRFUART_DATA_BIT_LEN_7 2 | |
266 | #define SIRFUART_DATA_BIT_LEN_8 3 | |
267 | #define SIRFUART_STOP_BIT_LEN_1 0 | |
268 | #define SIRFUART_STOP_BIT_LEN_2 BIT(2) | |
269 | #define SIRFUART_PARITY_EN BIT(3) | |
270 | #define SIRFUART_EVEN_BIT BIT(4) | |
271 | #define SIRFUART_STICK_BIT_MASK (7 << 3) | |
272 | #define SIRFUART_STICK_BIT_NONE (0 << 3) | |
273 | #define SIRFUART_STICK_BIT_EVEN BIT(3) | |
274 | #define SIRFUART_STICK_BIT_ODD (3 << 3) | |
275 | #define SIRFUART_STICK_BIT_MARK (5 << 3) | |
276 | #define SIRFUART_STICK_BIT_SPACE (7 << 3) | |
277 | #define SIRFUART_SET_BREAK BIT(6) | |
278 | #define SIRFUART_LOOP_BACK BIT(7) | |
279 | #define SIRFUART_PARITY_MASK (7 << 3) | |
280 | #define SIRFUART_DUMMY_READ BIT(16) | |
5df83111 | 281 | #define SIRFUART_AFC_CTRL_RX_THD 0x70 |
161e773c RW |
282 | #define SIRFUART_AFC_RX_EN BIT(8) |
283 | #define SIRFUART_AFC_TX_EN BIT(9) | |
5df83111 QL |
284 | #define SIRFUART_AFC_CTS_CTRL BIT(10) |
285 | #define SIRFUART_AFC_RTS_CTRL BIT(11) | |
286 | #define SIRFUART_AFC_CTS_STATUS BIT(12) | |
287 | #define SIRFUART_AFC_RTS_STATUS BIT(13) | |
161e773c | 288 | /* UART FIFO Register */ |
5df83111 QL |
289 | #define SIRFUART_FIFO_STOP 0x0 |
290 | #define SIRFUART_FIFO_RESET BIT(0) | |
291 | #define SIRFUART_FIFO_START BIT(1) | |
292 | ||
293 | #define SIRFUART_RX_EN BIT(0) | |
294 | #define SIRFUART_TX_EN BIT(1) | |
295 | ||
296 | #define SIRFUART_IO_MODE BIT(0) | |
297 | #define SIRFUART_DMA_MODE 0x0 | |
0f17e3b4 | 298 | #define SIRFUART_RX_DMA_FLUSH 0x4 |
5df83111 | 299 | |
1d26c9ff | 300 | #define SIRFUART_CLEAR_RX_ADDR_EN 0x2 |
5df83111 | 301 | /* Baud Rate Calculation */ |
cb4595a2 | 302 | #define SIRF_USP_MIN_SAMPLE_DIV 0x1 |
5df83111 QL |
303 | #define SIRF_MIN_SAMPLE_DIV 0xf |
304 | #define SIRF_MAX_SAMPLE_DIV 0x3f | |
305 | #define SIRF_IOCLK_DIV_MAX 0xffff | |
306 | #define SIRF_SAMPLE_DIV_SHIFT 16 | |
307 | #define SIRF_IOCLK_DIV_MASK 0xffff | |
308 | #define SIRF_SAMPLE_DIV_MASK 0x3f0000 | |
309 | #define SIRF_BAUD_RATE_SUPPORT_NR 18 | |
310 | ||
311 | /* USP SPEC */ | |
312 | #define SIRFSOC_USP_ENDIAN_CTRL_LSBF BIT(4) | |
313 | #define SIRFSOC_USP_EN BIT(5) | |
459f15c4 QL |
314 | #define SIRFSOC_USP_MODE2_RXD_DELAY_OFFSET 0 |
315 | #define SIRFSOC_USP_MODE2_TXD_DELAY_OFFSET 8 | |
316 | #define SIRFSOC_USP_MODE2_CLK_DIVISOR_MASK 0x3ff | |
317 | #define SIRFSOC_USP_MODE2_CLK_DIVISOR_OFFSET 21 | |
318 | #define SIRFSOC_USP_TX_DATA_LEN_OFFSET 0 | |
319 | #define SIRFSOC_USP_TX_SYNC_LEN_OFFSET 8 | |
320 | #define SIRFSOC_USP_TX_FRAME_LEN_OFFSET 16 | |
321 | #define SIRFSOC_USP_TX_SHIFTER_LEN_OFFSET 24 | |
322 | #define SIRFSOC_USP_TX_CLK_DIVISOR_OFFSET 30 | |
323 | #define SIRFSOC_USP_RX_DATA_LEN_OFFSET 0 | |
324 | #define SIRFSOC_USP_RX_FRAME_LEN_OFFSET 8 | |
325 | #define SIRFSOC_USP_RX_SHIFTER_LEN_OFFSET 16 | |
326 | #define SIRFSOC_USP_RX_CLK_DIVISOR_OFFSET 24 | |
327 | #define SIRFSOC_USP_ASYNC_DIV2_MASK 0x3f | |
328 | #define SIRFSOC_USP_ASYNC_DIV2_OFFSET 16 | |
7f60f2fe | 329 | #define SIRFSOC_USP_LOOP_BACK_CTRL BIT(2) |
1d26c9ff | 330 | #define SIRFSOC_USP_FRADDR_CLR_EN BIT(1) |
5df83111 QL |
331 | /* USP-UART Common */ |
332 | #define SIRFSOC_UART_RX_TIMEOUT(br, to) (((br) * (((to) + 999) / 1000)) / 1000) | |
333 | #define SIRFUART_RECV_TIMEOUT_VALUE(x) \ | |
334 | (((x) > 0xFFFF) ? 0xFFFF : ((x) & 0xFFFF)) | |
c1b7ac6f QL |
335 | #define SIRFUART_USP_RECV_TIMEOUT(x) (x & 0xFFFF) |
336 | #define SIRFUART_UART_RECV_TIMEOUT(x) ((x & 0xFFFF) << 16) | |
161e773c | 337 | |
cb4595a2 | 338 | #define SIRFUART_FIFO_THD(port) (port->fifosize >> 1) |
c1b7ac6f | 339 | #define SIRFUART_ERR_INT_STAT(unit_st, uart_type) \ |
5df83111 QL |
340 | (uint_st->sirfsoc_rx_oflow | \ |
341 | uint_st->sirfsoc_frm_err | \ | |
342 | uint_st->sirfsoc_rxd_brk | \ | |
c1b7ac6f QL |
343 | ((uart_type != SIRF_REAL_UART) ? \ |
344 | 0 : uint_st->sirfsoc_parity_err)) | |
345 | #define SIRFUART_RX_IO_INT_EN(uint_en, uart_type) \ | |
346 | (uint_en->sirfsoc_rx_done_en |\ | |
5df83111 QL |
347 | uint_en->sirfsoc_rxfifo_thd_en |\ |
348 | uint_en->sirfsoc_rxfifo_full_en |\ | |
349 | uint_en->sirfsoc_frm_err_en |\ | |
350 | uint_en->sirfsoc_rx_oflow_en |\ | |
351 | uint_en->sirfsoc_rxd_brk_en |\ | |
c1b7ac6f QL |
352 | ((uart_type != SIRF_REAL_UART) ? \ |
353 | 0 : uint_en->sirfsoc_parity_err_en)) | |
5df83111 | 354 | #define SIRFUART_RX_IO_INT_ST(uint_st) \ |
c1b7ac6f QL |
355 | (uint_st->sirfsoc_rxfifo_thd |\ |
356 | uint_st->sirfsoc_rxfifo_full|\ | |
357 | uint_st->sirfsoc_rx_done |\ | |
358 | uint_st->sirfsoc_rx_timeout) | |
5df83111 | 359 | #define SIRFUART_CTS_INT_ST(uint_st) (uint_st->sirfsoc_cts) |
c1b7ac6f | 360 | #define SIRFUART_RX_DMA_INT_EN(uint_en, uart_type) \ |
0f17e3b4 | 361 | (uint_en->sirfsoc_frm_err_en |\ |
8316d04c QL |
362 | uint_en->sirfsoc_rx_oflow_en |\ |
363 | uint_en->sirfsoc_rxd_brk_en |\ | |
c1b7ac6f QL |
364 | ((uart_type != SIRF_REAL_UART) ? \ |
365 | 0 : uint_en->sirfsoc_parity_err_en)) | |
161e773c RW |
366 | /* Generic Definitions */ |
367 | #define SIRFSOC_UART_NAME "ttySiRF" | |
368 | #define SIRFSOC_UART_MAJOR 0 | |
369 | #define SIRFSOC_UART_MINOR 0 | |
370 | #define SIRFUART_PORT_NAME "sirfsoc-uart" | |
371 | #define SIRFUART_MAP_SIZE 0x200 | |
a6ffe896 | 372 | #define SIRFSOC_UART_NR 11 |
161e773c RW |
373 | #define SIRFSOC_PORT_TYPE 0xa5 |
374 | ||
8316d04c | 375 | /* Uart Common Use Macro*/ |
0f17e3b4 | 376 | #define SIRFSOC_RX_DMA_BUF_SIZE (1024 * 32) |
8316d04c | 377 | #define BYTES_TO_ALIGN(dma_addr) ((unsigned long)(dma_addr) & 0x3) |
8316d04c QL |
378 | /* Uart Fifo Level Chk */ |
379 | #define SIRFUART_TX_FIFO_SC_OFFSET 0 | |
380 | #define SIRFUART_TX_FIFO_LC_OFFSET 10 | |
381 | #define SIRFUART_TX_FIFO_HC_OFFSET 20 | |
382 | #define SIRFUART_TX_FIFO_CHK_SC(line, value) ((((line) == 1) ? (value & 0x3) :\ | |
383 | (value & 0x1f)) << SIRFUART_TX_FIFO_SC_OFFSET) | |
384 | #define SIRFUART_TX_FIFO_CHK_LC(line, value) ((((line) == 1) ? (value & 0x3) :\ | |
385 | (value & 0x1f)) << SIRFUART_TX_FIFO_LC_OFFSET) | |
386 | #define SIRFUART_TX_FIFO_CHK_HC(line, value) ((((line) == 1) ? (value & 0x3) :\ | |
387 | (value & 0x1f)) << SIRFUART_TX_FIFO_HC_OFFSET) | |
388 | ||
389 | #define SIRFUART_RX_FIFO_CHK_SC SIRFUART_TX_FIFO_CHK_SC | |
390 | #define SIRFUART_RX_FIFO_CHK_LC SIRFUART_TX_FIFO_CHK_LC | |
391 | #define SIRFUART_RX_FIFO_CHK_HC SIRFUART_TX_FIFO_CHK_HC | |
0f17e3b4 | 392 | #define SIRFUART_RX_FIFO_MASK 0x7f |
8316d04c | 393 | /* Indicate how many buffers used */ |
8316d04c | 394 | |
161e773c RW |
395 | /* For Fast Baud Rate Calculation */ |
396 | struct sirfsoc_baudrate_to_regv { | |
397 | unsigned int baud_rate; | |
398 | unsigned int reg_val; | |
399 | }; | |
400 | ||
8316d04c QL |
401 | enum sirfsoc_tx_state { |
402 | TX_DMA_IDLE, | |
403 | TX_DMA_RUNNING, | |
404 | TX_DMA_PAUSE, | |
405 | }; | |
406 | ||
0f17e3b4 | 407 | struct sirfsoc_rx_buffer { |
8316d04c QL |
408 | struct circ_buf xmit; |
409 | dma_cookie_t cookie; | |
410 | struct dma_async_tx_descriptor *desc; | |
411 | dma_addr_t dma_addr; | |
412 | }; | |
413 | ||
161e773c | 414 | struct sirfsoc_uart_port { |
2eb5618d QL |
415 | bool hw_flow_ctrl; |
416 | bool ms_enabled; | |
161e773c RW |
417 | |
418 | struct uart_port port; | |
ac4ce718 | 419 | struct clk *clk; |
057badd6 BS |
420 | /* for SiRFatlas7, there are SET/CLR for UART_INT_EN */ |
421 | bool is_atlas7; | |
5df83111 | 422 | struct sirfsoc_uart_register *uart_reg; |
8316d04c QL |
423 | struct dma_chan *rx_dma_chan; |
424 | struct dma_chan *tx_dma_chan; | |
425 | dma_addr_t tx_dma_addr; | |
426 | struct dma_async_tx_descriptor *tx_dma_desc; | |
8316d04c QL |
427 | unsigned long transfer_size; |
428 | enum sirfsoc_tx_state tx_dma_state; | |
2eb5618d QL |
429 | unsigned int cts_gpio; |
430 | unsigned int rts_gpio; | |
8316d04c | 431 | |
0f17e3b4 QL |
432 | struct sirfsoc_rx_buffer rx_dma_items; |
433 | struct hrtimer hrt; | |
434 | bool is_hrt_enabled; | |
435 | unsigned long rx_period_time; | |
1d26c9ff QL |
436 | unsigned long rx_last_pos; |
437 | unsigned long pio_fetch_cnt; | |
161e773c RW |
438 | }; |
439 | ||
161e773c RW |
440 | /* Register Access Control */ |
441 | #define portaddr(port, reg) ((port)->membase + (reg)) | |
161e773c | 442 | #define rd_regl(port, reg) (__raw_readl(portaddr(port, reg))) |
161e773c RW |
443 | #define wr_regl(port, reg, val) __raw_writel(val, portaddr(port, reg)) |
444 | ||
445 | /* UART Port Mask */ | |
cb4595a2 QL |
446 | #define SIRFUART_FIFOLEVEL_MASK(port) ((port->fifosize - 1) & 0xFFF) |
447 | #define SIRFUART_FIFOFULL_MASK(port) (port->fifosize & 0xFFF) | |
448 | #define SIRFUART_FIFOEMPTY_MASK(port) ((port->fifosize & 0xFFF) << 1) |