wl1251: introduce wl1251_if_operations struct
[pandora-kernel.git] / drivers / net / wireless / wl12xx / wl1251_boot.c
1 /*
2  * This file is part of wl1251
3  *
4  * Copyright (C) 2008 Nokia Corporation
5  *
6  * Contact: Kalle Valo <kalle.valo@nokia.com>
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License
10  * version 2 as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20  * 02110-1301 USA
21  *
22  */
23
24 #include <linux/gpio.h>
25
26 #include "reg.h"
27 #include "wl1251_boot.h"
28 #include "wl1251_io.h"
29 #include "wl1251_spi.h"
30 #include "wl1251_event.h"
31
32 static void wl1251_boot_enable_interrupts(struct wl1251 *wl)
33 {
34         enable_irq(wl->irq);
35 }
36
37 void wl1251_boot_target_enable_interrupts(struct wl1251 *wl)
38 {
39         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
40         wl1251_reg_write32(wl, HI_CFG, HI_CFG_DEF_VAL);
41 }
42
43 int wl1251_boot_soft_reset(struct wl1251 *wl)
44 {
45         unsigned long timeout;
46         u32 boot_data;
47
48         /* perform soft reset */
49         wl1251_reg_write32(wl, ACX_REG_SLV_SOFT_RESET, ACX_SLV_SOFT_RESET_BIT);
50
51         /* SOFT_RESET is self clearing */
52         timeout = jiffies + usecs_to_jiffies(SOFT_RESET_MAX_TIME);
53         while (1) {
54                 boot_data = wl1251_reg_read32(wl, ACX_REG_SLV_SOFT_RESET);
55                 wl1251_debug(DEBUG_BOOT, "soft reset bootdata 0x%x", boot_data);
56                 if ((boot_data & ACX_SLV_SOFT_RESET_BIT) == 0)
57                         break;
58
59                 if (time_after(jiffies, timeout)) {
60                         /* 1.2 check pWhalBus->uSelfClearTime if the
61                          * timeout was reached */
62                         wl1251_error("soft reset timeout");
63                         return -1;
64                 }
65
66                 udelay(SOFT_RESET_STALL_TIME);
67         }
68
69         /* disable Rx/Tx */
70         wl1251_reg_write32(wl, ENABLE, 0x0);
71
72         /* disable auto calibration on start*/
73         wl1251_reg_write32(wl, SPARE_A2, 0xffff);
74
75         return 0;
76 }
77
78 int wl1251_boot_init_seq(struct wl1251 *wl)
79 {
80         u32 scr_pad6, init_data, tmp, elp_cmd, ref_freq;
81
82         /*
83          * col #1: INTEGER_DIVIDER
84          * col #2: FRACTIONAL_DIVIDER
85          * col #3: ATTN_BB
86          * col #4: ALPHA_BB
87          * col #5: STOP_TIME_BB
88          * col #6: BB_PLL_LOOP_FILTER
89          */
90         static const u32 LUT[REF_FREQ_NUM][LUT_PARAM_NUM] = {
91
92                 {   83, 87381,  0xB, 5, 0xF00,  3}, /* REF_FREQ_19_2*/
93                 {   61, 141154, 0xB, 5, 0x1450, 2}, /* REF_FREQ_26_0*/
94                 {   41, 174763, 0xC, 6, 0x2D00, 1}, /* REF_FREQ_38_4*/
95                 {   40, 0,      0xC, 6, 0x2EE0, 1}, /* REF_FREQ_40_0*/
96                 {   47, 162280, 0xC, 6, 0x2760, 1}  /* REF_FREQ_33_6        */
97         };
98
99         /* read NVS params */
100         scr_pad6 = wl1251_reg_read32(wl, SCR_PAD6);
101         wl1251_debug(DEBUG_BOOT, "scr_pad6 0x%x", scr_pad6);
102
103         /* read ELP_CMD */
104         elp_cmd = wl1251_reg_read32(wl, ELP_CMD);
105         wl1251_debug(DEBUG_BOOT, "elp_cmd 0x%x", elp_cmd);
106
107         /* set the BB calibration time to be 300 usec (PLL_CAL_TIME) */
108         ref_freq = scr_pad6 & 0x000000FF;
109         wl1251_debug(DEBUG_BOOT, "ref_freq 0x%x", ref_freq);
110
111         wl1251_reg_write32(wl, PLL_CAL_TIME, 0x9);
112
113         /*
114          * PG 1.2: set the clock buffer time to be 210 usec (CLK_BUF_TIME)
115          */
116         wl1251_reg_write32(wl, CLK_BUF_TIME, 0x6);
117
118         /*
119          * set the clock detect feature to work in the restart wu procedure
120          * (ELP_CFG_MODE[14]) and Select the clock source type
121          * (ELP_CFG_MODE[13:12])
122          */
123         tmp = ((scr_pad6 & 0x0000FF00) << 4) | 0x00004000;
124         wl1251_reg_write32(wl, ELP_CFG_MODE, tmp);
125
126         /* PG 1.2: enable the BB PLL fix. Enable the PLL_LIMP_CLK_EN_CMD */
127         elp_cmd |= 0x00000040;
128         wl1251_reg_write32(wl, ELP_CMD, elp_cmd);
129
130         /* PG 1.2: Set the BB PLL stable time to be 1000usec
131          * (PLL_STABLE_TIME) */
132         wl1251_reg_write32(wl, CFG_PLL_SYNC_CNT, 0x20);
133
134         /* PG 1.2: read clock request time */
135         init_data = wl1251_reg_read32(wl, CLK_REQ_TIME);
136
137         /*
138          * PG 1.2: set the clock request time to be ref_clk_settling_time -
139          * 1ms = 4ms
140          */
141         if (init_data > 0x21)
142                 tmp = init_data - 0x21;
143         else
144                 tmp = 0;
145         wl1251_reg_write32(wl, CLK_REQ_TIME, tmp);
146
147         /* set BB PLL configurations in RF AFE */
148         wl1251_reg_write32(wl, 0x003058cc, 0x4B5);
149
150         /* set RF_AFE_REG_5 */
151         wl1251_reg_write32(wl, 0x003058d4, 0x50);
152
153         /* set RF_AFE_CTRL_REG_2 */
154         wl1251_reg_write32(wl, 0x00305948, 0x11c001);
155
156         /*
157          * change RF PLL and BB PLL divider for VCO clock and adjust VCO
158          * bais current(RF_AFE_REG_13)
159          */
160         wl1251_reg_write32(wl, 0x003058f4, 0x1e);
161
162         /* set BB PLL configurations */
163         tmp = LUT[ref_freq][LUT_PARAM_INTEGER_DIVIDER] | 0x00017000;
164         wl1251_reg_write32(wl, 0x00305840, tmp);
165
166         /* set fractional divider according to Appendix C-BB PLL
167          * Calculations
168          */
169         tmp = LUT[ref_freq][LUT_PARAM_FRACTIONAL_DIVIDER];
170         wl1251_reg_write32(wl, 0x00305844, tmp);
171
172         /* set the initial data for the sigma delta */
173         wl1251_reg_write32(wl, 0x00305848, 0x3039);
174
175         /*
176          * set the accumulator attenuation value, calibration loop1
177          * (alpha), calibration loop2 (beta), calibration loop3 (gamma) and
178          * the VCO gain
179          */
180         tmp = (LUT[ref_freq][LUT_PARAM_ATTN_BB] << 16) |
181                 (LUT[ref_freq][LUT_PARAM_ALPHA_BB] << 12) | 0x1;
182         wl1251_reg_write32(wl, 0x00305854, tmp);
183
184         /*
185          * set the calibration stop time after holdoff time expires and set
186          * settling time HOLD_OFF_TIME_BB
187          */
188         tmp = LUT[ref_freq][LUT_PARAM_STOP_TIME_BB] | 0x000A0000;
189         wl1251_reg_write32(wl, 0x00305858, tmp);
190
191         /*
192          * set BB PLL Loop filter capacitor3- BB_C3[2:0] and set BB PLL
193          * constant leakage current to linearize PFD to 0uA -
194          * BB_ILOOPF[7:3]
195          */
196         tmp = LUT[ref_freq][LUT_PARAM_BB_PLL_LOOP_FILTER] | 0x00000030;
197         wl1251_reg_write32(wl, 0x003058f8, tmp);
198
199         /*
200          * set regulator output voltage for n divider to
201          * 1.35-BB_REFDIV[1:0], set charge pump current- BB_CPGAIN[4:2],
202          * set BB PLL Loop filter capacitor2- BB_C2[7:5], set gain of BB
203          * PLL auto-call to normal mode- BB_CALGAIN_3DB[8]
204          */
205         wl1251_reg_write32(wl, 0x003058f0, 0x29);
206
207         /* enable restart wakeup sequence (ELP_CMD[0]) */
208         wl1251_reg_write32(wl, ELP_CMD, elp_cmd | 0x1);
209
210         /* restart sequence completed */
211         udelay(2000);
212
213         return 0;
214 }
215
216 int wl1251_boot_run_firmware(struct wl1251 *wl)
217 {
218         int loop, ret;
219         u32 chip_id, interrupt;
220
221         wl->chip.op_set_ecpu_ctrl(wl, ECPU_CONTROL_HALT);
222
223         chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
224
225         wl1251_debug(DEBUG_BOOT, "chip id after firmware boot: 0x%x", chip_id);
226
227         if (chip_id != wl->chip.id) {
228                 wl1251_error("chip id doesn't match after firmware boot");
229                 return -EIO;
230         }
231
232         /* wait for init to complete */
233         loop = 0;
234         while (loop++ < INIT_LOOP) {
235                 udelay(INIT_LOOP_DELAY);
236                 interrupt = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
237
238                 if (interrupt == 0xffffffff) {
239                         wl1251_error("error reading hardware complete "
240                                      "init indication");
241                         return -EIO;
242                 }
243                 /* check that ACX_INTR_INIT_COMPLETE is enabled */
244                 else if (interrupt & wl->chip.intr_init_complete) {
245                         wl1251_reg_write32(wl, ACX_REG_INTERRUPT_ACK,
246                                            wl->chip.intr_init_complete);
247                         break;
248                 }
249         }
250
251         if (loop >= INIT_LOOP) {
252                 wl1251_error("timeout waiting for the hardware to "
253                              "complete initialization");
254                 return -EIO;
255         }
256
257         /* get hardware config command mail box */
258         wl->cmd_box_addr = wl1251_reg_read32(wl, REG_COMMAND_MAILBOX_PTR);
259
260         /* get hardware config event mail box */
261         wl->event_box_addr = wl1251_reg_read32(wl, REG_EVENT_MAILBOX_PTR);
262
263         /* set the working partition to its "running" mode offset */
264         wl1251_set_partition(wl,
265                              wl->chip.p_table[PART_WORK].mem.start,
266                              wl->chip.p_table[PART_WORK].mem.size,
267                              wl->chip.p_table[PART_WORK].reg.start,
268                              wl->chip.p_table[PART_WORK].reg.size);
269
270         wl1251_debug(DEBUG_MAILBOX, "cmd_box_addr 0x%x event_box_addr 0x%x",
271                      wl->cmd_box_addr, wl->event_box_addr);
272
273         wl->chip.op_fw_version(wl);
274
275         /*
276          * in case of full asynchronous mode the firmware event must be
277          * ready to receive event from the command mailbox
278          */
279
280         /* enable gpio interrupts */
281         wl1251_boot_enable_interrupts(wl);
282
283         wl->chip.op_target_enable_interrupts(wl);
284
285         /* unmask all mbox events  */
286         wl->event_mask = 0xffffffff;
287
288         ret = wl1251_event_unmask(wl);
289         if (ret < 0) {
290                 wl1251_error("EVENT mask setting failed");
291                 return ret;
292         }
293
294         wl1251_event_mbox_config(wl);
295
296         /* firmware startup completed */
297         return 0;
298 }