1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Low-level device IO routines for ST-Ericsson CW1200 drivers
4 *
5 * Copyright (c) 2010, ST-Ericsson
6 * Author: Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>
7 *
8 * Based on:
9 * ST-Ericsson UMAC CW1200 driver, which is
10 * Copyright (c) 2010, ST-Ericsson
11 * Author: Ajitpal Singh <ajitpal.singh@lockless.no>
12 */
13
14 #include <linux/types.h>
15
16 #include "cw1200.h"
17 #include "hwio.h"
18 #include "hwbus.h"
19
20 /* Sdio addr is 4*spi_addr */
21 #define SPI_REG_ADDR_TO_SDIO(spi_reg_addr) ((spi_reg_addr) << 2)
22 #define SDIO_ADDR17BIT(buf_id, mpf, rfu, reg_id_ofs) \
23 ((((buf_id) & 0x1F) << 7) \
24 | (((mpf) & 1) << 6) \
25 | (((rfu) & 1) << 5) \
26 | (((reg_id_ofs) & 0x1F) << 0))
27 #define MAX_RETRY 3
28
29
__cw1200_reg_read(struct cw1200_common * priv,u16 addr,void * buf,size_t buf_len,int buf_id)30 static int __cw1200_reg_read(struct cw1200_common *priv, u16 addr,
31 void *buf, size_t buf_len, int buf_id)
32 {
33 u16 addr_sdio;
34 u32 sdio_reg_addr_17bit;
35
36 /* Check if buffer is aligned to 4 byte boundary */
37 if (WARN_ON(((unsigned long)buf & 3) && (buf_len > 4))) {
38 pr_err("buffer is not aligned.\n");
39 return -EINVAL;
40 }
41
42 /* Convert to SDIO Register Address */
43 addr_sdio = SPI_REG_ADDR_TO_SDIO(addr);
44 sdio_reg_addr_17bit = SDIO_ADDR17BIT(buf_id, 0, 0, addr_sdio);
45
46 return priv->hwbus_ops->hwbus_memcpy_fromio(priv->hwbus_priv,
47 sdio_reg_addr_17bit,
48 buf, buf_len);
49 }
50
__cw1200_reg_write(struct cw1200_common * priv,u16 addr,const void * buf,size_t buf_len,int buf_id)51 static int __cw1200_reg_write(struct cw1200_common *priv, u16 addr,
52 const void *buf, size_t buf_len, int buf_id)
53 {
54 u16 addr_sdio;
55 u32 sdio_reg_addr_17bit;
56
57 /* Convert to SDIO Register Address */
58 addr_sdio = SPI_REG_ADDR_TO_SDIO(addr);
59 sdio_reg_addr_17bit = SDIO_ADDR17BIT(buf_id, 0, 0, addr_sdio);
60
61 return priv->hwbus_ops->hwbus_memcpy_toio(priv->hwbus_priv,
62 sdio_reg_addr_17bit,
63 buf, buf_len);
64 }
65
__cw1200_reg_read_32(struct cw1200_common * priv,u16 addr,u32 * val)66 static inline int __cw1200_reg_read_32(struct cw1200_common *priv,
67 u16 addr, u32 *val)
68 {
69 __le32 tmp;
70 int i = __cw1200_reg_read(priv, addr, &tmp, sizeof(tmp), 0);
71 *val = le32_to_cpu(tmp);
72 return i;
73 }
74
__cw1200_reg_write_32(struct cw1200_common * priv,u16 addr,u32 val)75 static inline int __cw1200_reg_write_32(struct cw1200_common *priv,
76 u16 addr, u32 val)
77 {
78 __le32 tmp = cpu_to_le32(val);
79 return __cw1200_reg_write(priv, addr, &tmp, sizeof(tmp), 0);
80 }
81
__cw1200_reg_read_16(struct cw1200_common * priv,u16 addr,u16 * val)82 static inline int __cw1200_reg_read_16(struct cw1200_common *priv,
83 u16 addr, u16 *val)
84 {
85 __le16 tmp;
86 int i = __cw1200_reg_read(priv, addr, &tmp, sizeof(tmp), 0);
87 *val = le16_to_cpu(tmp);
88 return i;
89 }
90
__cw1200_reg_write_16(struct cw1200_common * priv,u16 addr,u16 val)91 static inline int __cw1200_reg_write_16(struct cw1200_common *priv,
92 u16 addr, u16 val)
93 {
94 __le16 tmp = cpu_to_le16(val);
95 return __cw1200_reg_write(priv, addr, &tmp, sizeof(tmp), 0);
96 }
97
cw1200_reg_read(struct cw1200_common * priv,u16 addr,void * buf,size_t buf_len)98 int cw1200_reg_read(struct cw1200_common *priv, u16 addr, void *buf,
99 size_t buf_len)
100 {
101 int ret;
102 priv->hwbus_ops->lock(priv->hwbus_priv);
103 ret = __cw1200_reg_read(priv, addr, buf, buf_len, 0);
104 priv->hwbus_ops->unlock(priv->hwbus_priv);
105 return ret;
106 }
107
cw1200_reg_write(struct cw1200_common * priv,u16 addr,const void * buf,size_t buf_len)108 int cw1200_reg_write(struct cw1200_common *priv, u16 addr, const void *buf,
109 size_t buf_len)
110 {
111 int ret;
112 priv->hwbus_ops->lock(priv->hwbus_priv);
113 ret = __cw1200_reg_write(priv, addr, buf, buf_len, 0);
114 priv->hwbus_ops->unlock(priv->hwbus_priv);
115 return ret;
116 }
117
cw1200_data_read(struct cw1200_common * priv,void * buf,size_t buf_len)118 int cw1200_data_read(struct cw1200_common *priv, void *buf, size_t buf_len)
119 {
120 int ret, retry = 1;
121 int buf_id_rx = priv->buf_id_rx;
122
123 priv->hwbus_ops->lock(priv->hwbus_priv);
124
125 while (retry <= MAX_RETRY) {
126 ret = __cw1200_reg_read(priv,
127 ST90TDS_IN_OUT_QUEUE_REG_ID, buf,
128 buf_len, buf_id_rx + 1);
129 if (!ret) {
130 buf_id_rx = (buf_id_rx + 1) & 3;
131 priv->buf_id_rx = buf_id_rx;
132 break;
133 } else {
134 retry++;
135 mdelay(1);
136 pr_err("error :[%d]\n", ret);
137 }
138 }
139
140 priv->hwbus_ops->unlock(priv->hwbus_priv);
141 return ret;
142 }
143
cw1200_data_write(struct cw1200_common * priv,const void * buf,size_t buf_len)144 int cw1200_data_write(struct cw1200_common *priv, const void *buf,
145 size_t buf_len)
146 {
147 int ret, retry = 1;
148 int buf_id_tx = priv->buf_id_tx;
149
150 priv->hwbus_ops->lock(priv->hwbus_priv);
151
152 while (retry <= MAX_RETRY) {
153 ret = __cw1200_reg_write(priv,
154 ST90TDS_IN_OUT_QUEUE_REG_ID, buf,
155 buf_len, buf_id_tx);
156 if (!ret) {
157 buf_id_tx = (buf_id_tx + 1) & 31;
158 priv->buf_id_tx = buf_id_tx;
159 break;
160 } else {
161 retry++;
162 mdelay(1);
163 pr_err("error :[%d]\n", ret);
164 }
165 }
166
167 priv->hwbus_ops->unlock(priv->hwbus_priv);
168 return ret;
169 }
170
cw1200_indirect_read(struct cw1200_common * priv,u32 addr,void * buf,size_t buf_len,u32 prefetch,u16 port_addr)171 int cw1200_indirect_read(struct cw1200_common *priv, u32 addr, void *buf,
172 size_t buf_len, u32 prefetch, u16 port_addr)
173 {
174 u32 val32 = 0;
175 int i, ret;
176
177 if ((buf_len / 2) >= 0x1000) {
178 pr_err("Can't read more than 0xfff words.\n");
179 return -EINVAL;
180 }
181
182 priv->hwbus_ops->lock(priv->hwbus_priv);
183 /* Write address */
184 ret = __cw1200_reg_write_32(priv, ST90TDS_SRAM_BASE_ADDR_REG_ID, addr);
185 if (ret < 0) {
186 pr_err("Can't write address register.\n");
187 goto out;
188 }
189
190 /* Read CONFIG Register Value - We will read 32 bits */
191 ret = __cw1200_reg_read_32(priv, ST90TDS_CONFIG_REG_ID, &val32);
192 if (ret < 0) {
193 pr_err("Can't read config register.\n");
194 goto out;
195 }
196
197 /* Set PREFETCH bit */
198 ret = __cw1200_reg_write_32(priv, ST90TDS_CONFIG_REG_ID,
199 val32 | prefetch);
200 if (ret < 0) {
201 pr_err("Can't write prefetch bit.\n");
202 goto out;
203 }
204
205 /* Check for PRE-FETCH bit to be cleared */
206 for (i = 0; i < 20; i++) {
207 ret = __cw1200_reg_read_32(priv, ST90TDS_CONFIG_REG_ID, &val32);
208 if (ret < 0) {
209 pr_err("Can't check prefetch bit.\n");
210 goto out;
211 }
212 if (!(val32 & prefetch))
213 break;
214
215 mdelay(i);
216 }
217
218 if (val32 & prefetch) {
219 pr_err("Prefetch bit is not cleared.\n");
220 goto out;
221 }
222
223 /* Read data port */
224 ret = __cw1200_reg_read(priv, port_addr, buf, buf_len, 0);
225 if (ret < 0) {
226 pr_err("Can't read data port.\n");
227 goto out;
228 }
229
230 out:
231 priv->hwbus_ops->unlock(priv->hwbus_priv);
232 return ret;
233 }
234
cw1200_apb_write(struct cw1200_common * priv,u32 addr,const void * buf,size_t buf_len)235 int cw1200_apb_write(struct cw1200_common *priv, u32 addr, const void *buf,
236 size_t buf_len)
237 {
238 int ret;
239
240 if ((buf_len / 2) >= 0x1000) {
241 pr_err("Can't write more than 0xfff words.\n");
242 return -EINVAL;
243 }
244
245 priv->hwbus_ops->lock(priv->hwbus_priv);
246
247 /* Write address */
248 ret = __cw1200_reg_write_32(priv, ST90TDS_SRAM_BASE_ADDR_REG_ID, addr);
249 if (ret < 0) {
250 pr_err("Can't write address register.\n");
251 goto out;
252 }
253
254 /* Write data port */
255 ret = __cw1200_reg_write(priv, ST90TDS_SRAM_DPORT_REG_ID,
256 buf, buf_len, 0);
257 if (ret < 0) {
258 pr_err("Can't write data port.\n");
259 goto out;
260 }
261
262 out:
263 priv->hwbus_ops->unlock(priv->hwbus_priv);
264 return ret;
265 }
266
__cw1200_irq_enable(struct cw1200_common * priv,int enable)267 int __cw1200_irq_enable(struct cw1200_common *priv, int enable)
268 {
269 u32 val32;
270 u16 val16;
271 int ret;
272
273 if (HIF_8601_SILICON == priv->hw_type) {
274 ret = __cw1200_reg_read_32(priv, ST90TDS_CONFIG_REG_ID, &val32);
275 if (ret < 0) {
276 pr_err("Can't read config register.\n");
277 return ret;
278 }
279
280 if (enable)
281 val32 |= ST90TDS_CONF_IRQ_RDY_ENABLE;
282 else
283 val32 &= ~ST90TDS_CONF_IRQ_RDY_ENABLE;
284
285 ret = __cw1200_reg_write_32(priv, ST90TDS_CONFIG_REG_ID, val32);
286 if (ret < 0) {
287 pr_err("Can't write config register.\n");
288 return ret;
289 }
290 } else {
291 ret = __cw1200_reg_read_16(priv, ST90TDS_CONFIG_REG_ID, &val16);
292 if (ret < 0) {
293 pr_err("Can't read control register.\n");
294 return ret;
295 }
296
297 if (enable)
298 val16 |= ST90TDS_CONT_IRQ_RDY_ENABLE;
299 else
300 val16 &= ~ST90TDS_CONT_IRQ_RDY_ENABLE;
301
302 ret = __cw1200_reg_write_16(priv, ST90TDS_CONFIG_REG_ID, val16);
303 if (ret < 0) {
304 pr_err("Can't write control register.\n");
305 return ret;
306 }
307 }
308 return 0;
309 }
310