]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - drivers/mfd/rts5229.c
Merge branch 'ib-iio-mfd-ti335x_dma' into togreg
[mirror_ubuntu-zesty-kernel.git] / drivers / mfd / rts5229.c
1 /* Driver for Realtek PCI-Express card reader
2 *
3 * Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2, or (at your option) any
8 * later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, see <http://www.gnu.org/licenses/>.
17 *
18 * Author:
19 * Wei WANG <wei_wang@realsil.com.cn>
20 */
21
22 #include <linux/module.h>
23 #include <linux/delay.h>
24 #include <linux/mfd/rtsx_pci.h>
25
26 #include "rtsx_pcr.h"
27
28 static u8 rts5229_get_ic_version(struct rtsx_pcr *pcr)
29 {
30 u8 val;
31
32 rtsx_pci_read_register(pcr, DUMMY_REG_RESET_0, &val);
33 return val & 0x0F;
34 }
35
36 static void rts5229_fetch_vendor_settings(struct rtsx_pcr *pcr)
37 {
38 u32 reg;
39
40 rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG1, &reg);
41 pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG1, reg);
42
43 if (!rtsx_vendor_setting_valid(reg))
44 return;
45
46 pcr->aspm_en = rtsx_reg_to_aspm(reg);
47 pcr->sd30_drive_sel_1v8 =
48 map_sd_drive(rtsx_reg_to_sd30_drive_sel_1v8(reg));
49 pcr->card_drive_sel &= 0x3F;
50 pcr->card_drive_sel |= rtsx_reg_to_card_drive_sel(reg);
51
52 rtsx_pci_read_config_dword(pcr, PCR_SETTING_REG2, &reg);
53 pcr_dbg(pcr, "Cfg 0x%x: 0x%x\n", PCR_SETTING_REG2, reg);
54 pcr->sd30_drive_sel_3v3 =
55 map_sd_drive(rtsx_reg_to_sd30_drive_sel_3v3(reg));
56 }
57
58 static void rts5229_force_power_down(struct rtsx_pcr *pcr, u8 pm_state)
59 {
60 rtsx_pci_write_register(pcr, FPDCTL, 0x03, 0x03);
61 }
62
63 static int rts5229_extra_init_hw(struct rtsx_pcr *pcr)
64 {
65 rtsx_pci_init_cmd(pcr);
66
67 /* Configure GPIO as output */
68 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, GPIO_CTL, 0x02, 0x02);
69 /* Reset ASPM state to default value */
70 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, ASPM_FORCE_CTL, 0x3F, 0);
71 /* Force CLKREQ# PIN to drive 0 to request clock */
72 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PETXCFG, 0x08, 0x08);
73 /* Switch LDO3318 source from DV33 to card_3v3 */
74 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x00);
75 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, LDO_PWR_SEL, 0x03, 0x01);
76 /* LED shine disabled, set initial shine cycle period */
77 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, OLT_LED_CTL, 0x0F, 0x02);
78 /* Configure driving */
79 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, SD30_DRIVE_SEL,
80 0xFF, pcr->sd30_drive_sel_3v3);
81
82 return rtsx_pci_send_cmd(pcr, 100);
83 }
84
85 static int rts5229_optimize_phy(struct rtsx_pcr *pcr)
86 {
87 /* Optimize RX sensitivity */
88 return rtsx_pci_write_phy_register(pcr, 0x00, 0xBA42);
89 }
90
91 static int rts5229_turn_on_led(struct rtsx_pcr *pcr)
92 {
93 return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x02);
94 }
95
96 static int rts5229_turn_off_led(struct rtsx_pcr *pcr)
97 {
98 return rtsx_pci_write_register(pcr, GPIO_CTL, 0x02, 0x00);
99 }
100
101 static int rts5229_enable_auto_blink(struct rtsx_pcr *pcr)
102 {
103 return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x08);
104 }
105
106 static int rts5229_disable_auto_blink(struct rtsx_pcr *pcr)
107 {
108 return rtsx_pci_write_register(pcr, OLT_LED_CTL, 0x08, 0x00);
109 }
110
111 static int rts5229_card_power_on(struct rtsx_pcr *pcr, int card)
112 {
113 int err;
114
115 rtsx_pci_init_cmd(pcr);
116 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
117 SD_POWER_MASK, SD_PARTIAL_POWER_ON);
118 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
119 LDO3318_PWR_MASK, 0x02);
120 err = rtsx_pci_send_cmd(pcr, 100);
121 if (err < 0)
122 return err;
123
124 /* To avoid too large in-rush current */
125 udelay(150);
126
127 rtsx_pci_init_cmd(pcr);
128 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
129 SD_POWER_MASK, SD_POWER_ON);
130 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
131 LDO3318_PWR_MASK, 0x06);
132 return rtsx_pci_send_cmd(pcr, 100);
133 }
134
135 static int rts5229_card_power_off(struct rtsx_pcr *pcr, int card)
136 {
137 rtsx_pci_init_cmd(pcr);
138 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, CARD_PWR_CTL,
139 SD_POWER_MASK | PMOS_STRG_MASK,
140 SD_POWER_OFF | PMOS_STRG_400mA);
141 rtsx_pci_add_cmd(pcr, WRITE_REG_CMD, PWR_GATE_CTRL,
142 LDO3318_PWR_MASK, 0x00);
143 return rtsx_pci_send_cmd(pcr, 100);
144 }
145
146 static int rts5229_switch_output_voltage(struct rtsx_pcr *pcr, u8 voltage)
147 {
148 int err;
149
150 if (voltage == OUTPUT_3V3) {
151 err = rtsx_pci_write_register(pcr,
152 SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_3v3);
153 if (err < 0)
154 return err;
155 err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4FC0 | 0x24);
156 if (err < 0)
157 return err;
158 } else if (voltage == OUTPUT_1V8) {
159 err = rtsx_pci_write_register(pcr,
160 SD30_DRIVE_SEL, 0x07, pcr->sd30_drive_sel_1v8);
161 if (err < 0)
162 return err;
163 err = rtsx_pci_write_phy_register(pcr, 0x08, 0x4C40 | 0x24);
164 if (err < 0)
165 return err;
166 } else {
167 return -EINVAL;
168 }
169
170 return 0;
171 }
172
173 static const struct pcr_ops rts5229_pcr_ops = {
174 .fetch_vendor_settings = rts5229_fetch_vendor_settings,
175 .extra_init_hw = rts5229_extra_init_hw,
176 .optimize_phy = rts5229_optimize_phy,
177 .turn_on_led = rts5229_turn_on_led,
178 .turn_off_led = rts5229_turn_off_led,
179 .enable_auto_blink = rts5229_enable_auto_blink,
180 .disable_auto_blink = rts5229_disable_auto_blink,
181 .card_power_on = rts5229_card_power_on,
182 .card_power_off = rts5229_card_power_off,
183 .switch_output_voltage = rts5229_switch_output_voltage,
184 .cd_deglitch = NULL,
185 .conv_clk_and_div_n = NULL,
186 .force_power_down = rts5229_force_power_down,
187 };
188
189 /* SD Pull Control Enable:
190 * SD_DAT[3:0] ==> pull up
191 * SD_CD ==> pull up
192 * SD_WP ==> pull up
193 * SD_CMD ==> pull up
194 * SD_CLK ==> pull down
195 */
196 static const u32 rts5229_sd_pull_ctl_enable_tbl1[] = {
197 RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
198 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE9),
199 0,
200 };
201
202 /* For RTS5229 version C */
203 static const u32 rts5229_sd_pull_ctl_enable_tbl2[] = {
204 RTSX_REG_PAIR(CARD_PULL_CTL2, 0xAA),
205 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD9),
206 0,
207 };
208
209 /* SD Pull Control Disable:
210 * SD_DAT[3:0] ==> pull down
211 * SD_CD ==> pull up
212 * SD_WP ==> pull down
213 * SD_CMD ==> pull down
214 * SD_CLK ==> pull down
215 */
216 static const u32 rts5229_sd_pull_ctl_disable_tbl1[] = {
217 RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
218 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xD5),
219 0,
220 };
221
222 /* For RTS5229 version C */
223 static const u32 rts5229_sd_pull_ctl_disable_tbl2[] = {
224 RTSX_REG_PAIR(CARD_PULL_CTL2, 0x55),
225 RTSX_REG_PAIR(CARD_PULL_CTL3, 0xE5),
226 0,
227 };
228
229 /* MS Pull Control Enable:
230 * MS CD ==> pull up
231 * others ==> pull down
232 */
233 static const u32 rts5229_ms_pull_ctl_enable_tbl[] = {
234 RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
235 RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
236 0,
237 };
238
239 /* MS Pull Control Disable:
240 * MS CD ==> pull up
241 * others ==> pull down
242 */
243 static const u32 rts5229_ms_pull_ctl_disable_tbl[] = {
244 RTSX_REG_PAIR(CARD_PULL_CTL5, 0x55),
245 RTSX_REG_PAIR(CARD_PULL_CTL6, 0x15),
246 0,
247 };
248
249 void rts5229_init_params(struct rtsx_pcr *pcr)
250 {
251 pcr->extra_caps = EXTRA_CAPS_SD_SDR50 | EXTRA_CAPS_SD_SDR104;
252 pcr->num_slots = 2;
253 pcr->ops = &rts5229_pcr_ops;
254
255 pcr->flags = 0;
256 pcr->card_drive_sel = RTSX_CARD_DRIVE_DEFAULT;
257 pcr->sd30_drive_sel_1v8 = DRIVER_TYPE_B;
258 pcr->sd30_drive_sel_3v3 = DRIVER_TYPE_D;
259 pcr->aspm_en = ASPM_L1_EN;
260 pcr->tx_initial_phase = SET_CLOCK_PHASE(27, 27, 15);
261 pcr->rx_initial_phase = SET_CLOCK_PHASE(30, 6, 6);
262
263 pcr->ic_version = rts5229_get_ic_version(pcr);
264 if (pcr->ic_version == IC_VER_C) {
265 pcr->sd_pull_ctl_enable_tbl = rts5229_sd_pull_ctl_enable_tbl2;
266 pcr->sd_pull_ctl_disable_tbl = rts5229_sd_pull_ctl_disable_tbl2;
267 } else {
268 pcr->sd_pull_ctl_enable_tbl = rts5229_sd_pull_ctl_enable_tbl1;
269 pcr->sd_pull_ctl_disable_tbl = rts5229_sd_pull_ctl_disable_tbl1;
270 }
271 pcr->ms_pull_ctl_enable_tbl = rts5229_ms_pull_ctl_enable_tbl;
272 pcr->ms_pull_ctl_disable_tbl = rts5229_ms_pull_ctl_disable_tbl;
273 }