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Jaehoon Chung442d5562012-04-23 02:36:28 +00001/*
2 * (C) Copyright 2012 SAMSUNG Electronics
3 * Jaehoon Chung <jh80.chung@samsung.com>
4 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02005 * SPDX-License-Identifier: GPL-2.0+
Jaehoon Chung442d5562012-04-23 02:36:28 +00006 */
7
8#include <common.h>
Jaehoon Chung7aedafd2016-09-09 18:23:23 +09009#include <dm.h>
Jaehoon Chung442d5562012-04-23 02:36:28 +000010#include <malloc.h>
11#include <sdhci.h>
Piotr Wilczek3577fe82014-03-07 14:59:41 +010012#include <fdtdec.h>
13#include <libfdt.h>
14#include <asm/gpio.h>
Jaehoon Chung442d5562012-04-23 02:36:28 +000015#include <asm/arch/mmc.h>
Jaehoon Chungb09ed6e2012-08-30 16:24:11 +000016#include <asm/arch/clk.h>
Piotr Wilczek3577fe82014-03-07 14:59:41 +010017#include <errno.h>
Piotr Wilczek3577fe82014-03-07 14:59:41 +010018#include <asm/arch/pinmux.h>
Jaehoon Chung442d5562012-04-23 02:36:28 +000019
Jaehoon Chung7aedafd2016-09-09 18:23:23 +090020#ifdef CONFIG_DM_MMC
21struct s5p_sdhci_plat {
22 struct mmc_config cfg;
23 struct mmc mmc;
24};
25
26DECLARE_GLOBAL_DATA_PTR;
27#endif
28
Jaehoon Chung442d5562012-04-23 02:36:28 +000029static char *S5P_NAME = "SAMSUNG SDHCI";
30static void s5p_sdhci_set_control_reg(struct sdhci_host *host)
31{
32 unsigned long val, ctrl;
33 /*
34 * SELCLKPADDS[17:16]
35 * 00 = 2mA
36 * 01 = 4mA
37 * 10 = 7mA
38 * 11 = 9mA
39 */
40 sdhci_writel(host, SDHCI_CTRL4_DRIVE_MASK(0x3), SDHCI_CONTROL4);
41
42 val = sdhci_readl(host, SDHCI_CONTROL2);
Matt Reimer8ebde4f2015-02-23 14:52:22 -070043 val &= SDHCI_CTRL2_SELBASECLK_MASK(3);
Jaehoon Chung442d5562012-04-23 02:36:28 +000044
45 val |= SDHCI_CTRL2_ENSTAASYNCCLR |
46 SDHCI_CTRL2_ENCMDCNFMSK |
47 SDHCI_CTRL2_ENFBCLKRX |
48 SDHCI_CTRL2_ENCLKOUTHOLD;
49
50 sdhci_writel(host, val, SDHCI_CONTROL2);
51
52 /*
53 * FCSEL3[31] FCSEL2[23] FCSEL1[15] FCSEL0[7]
54 * FCSel[1:0] : Rx Feedback Clock Delay Control
55 * Inverter delay means10ns delay if SDCLK 50MHz setting
56 * 01 = Delay1 (basic delay)
57 * 11 = Delay2 (basic delay + 2ns)
58 * 00 = Delay3 (inverter delay)
59 * 10 = Delay4 (inverter delay + 2ns)
60 */
Jaehoon Chungb2686602012-08-30 16:24:08 +000061 val = SDHCI_CTRL3_FCSEL0 | SDHCI_CTRL3_FCSEL1;
Jaehoon Chung442d5562012-04-23 02:36:28 +000062 sdhci_writel(host, val, SDHCI_CONTROL3);
63
64 /*
65 * SELBASECLK[5:4]
66 * 00/01 = HCLK
67 * 10 = EPLL
68 * 11 = XTI or XEXTCLK
69 */
70 ctrl = sdhci_readl(host, SDHCI_CONTROL2);
71 ctrl &= ~SDHCI_CTRL2_SELBASECLK_MASK(0x3);
72 ctrl |= SDHCI_CTRL2_SELBASECLK_MASK(0x2);
73 sdhci_writel(host, ctrl, SDHCI_CONTROL2);
74}
75
Jaehoon Chungf73b33f2016-12-30 15:30:17 +090076static void s5p_set_clock(struct sdhci_host *host, u32 div)
77{
78 /* ToDo : Use the Clock Framework */
79 set_mmc_clk(host->index, div);
80}
81
Jaehoon Chung62226b62016-12-30 15:30:18 +090082static const struct sdhci_ops s5p_sdhci_ops = {
83 .set_clock = &s5p_set_clock,
84 .set_control_reg = &s5p_sdhci_set_control_reg,
85};
86
Jaehoon Chung9b8c9a32014-05-16 13:59:59 +090087static int s5p_sdhci_core_init(struct sdhci_host *host)
Jaehoon Chung442d5562012-04-23 02:36:28 +000088{
Jaehoon Chung442d5562012-04-23 02:36:28 +000089 host->name = S5P_NAME;
Jaehoon Chung442d5562012-04-23 02:36:28 +000090
Jaehoon Chungb2686602012-08-30 16:24:08 +000091 host->quirks = SDHCI_QUIRK_NO_HISPD_BIT | SDHCI_QUIRK_BROKEN_VOLTAGE |
Jaehoon Chunga034ec02016-07-12 21:18:47 +090092 SDHCI_QUIRK_32BIT_DMA_ADDR |
Jaehoon Chung113e5df2013-07-19 17:44:49 +090093 SDHCI_QUIRK_WAIT_SEND_CMD | SDHCI_QUIRK_USE_WIDE8;
Stefan Herbrechtsmeier6d0e34b2017-01-17 15:58:48 +010094 host->max_clk = 52000000;
Jaehoon Chung442d5562012-04-23 02:36:28 +000095 host->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
Jaehoon Chung62226b62016-12-30 15:30:18 +090096 host->ops = &s5p_sdhci_ops;
Jaehoon Chung442d5562012-04-23 02:36:28 +000097
Jaehoon Chung9b8c9a32014-05-16 13:59:59 +090098 if (host->bus_width == 8)
Jaehoon Chung113e5df2013-07-19 17:44:49 +090099 host->host_caps |= MMC_MODE_8BIT;
Jaehoon Chung442d5562012-04-23 02:36:28 +0000100
Jaehoon Chung7aedafd2016-09-09 18:23:23 +0900101#ifndef CONFIG_BLK
Stefan Herbrechtsmeier6d0e34b2017-01-17 15:58:48 +0100102 return add_sdhci(host, 0, 400000);
Jaehoon Chung7aedafd2016-09-09 18:23:23 +0900103#else
104 return 0;
105#endif
Jaehoon Chung442d5562012-04-23 02:36:28 +0000106}
Piotr Wilczek3577fe82014-03-07 14:59:41 +0100107
Jaehoon Chung9b8c9a32014-05-16 13:59:59 +0900108int s5p_sdhci_init(u32 regbase, int index, int bus_width)
109{
Tobias Jakobi1a9d1732015-10-05 13:47:50 +0200110 struct sdhci_host *host = calloc(1, sizeof(struct sdhci_host));
Jaehoon Chung9b8c9a32014-05-16 13:59:59 +0900111 if (!host) {
Tobias Jakobi1a9d1732015-10-05 13:47:50 +0200112 printf("sdhci__host allocation fail!\n");
Jaehoon Chung2cb5d672016-09-26 08:10:02 +0900113 return -ENOMEM;
Jaehoon Chung9b8c9a32014-05-16 13:59:59 +0900114 }
115 host->ioaddr = (void *)regbase;
116 host->index = index;
117 host->bus_width = bus_width;
118
119 return s5p_sdhci_core_init(host);
120}
121
Masahiro Yamada0f925822015-08-12 07:31:55 +0900122#if CONFIG_IS_ENABLED(OF_CONTROL)
Piotr Wilczek3577fe82014-03-07 14:59:41 +0100123struct sdhci_host sdhci_host[SDHCI_MAX_HOSTS];
124
125static int do_sdhci_init(struct sdhci_host *host)
126{
Tobias Jakobi2308ea72015-10-05 13:47:53 +0200127 int dev_id, flag, ret;
Piotr Wilczek3577fe82014-03-07 14:59:41 +0100128
129 flag = host->bus_width == 8 ? PINMUX_FLAG_8BIT_MODE : PINMUX_FLAG_NONE;
130 dev_id = host->index + PERIPH_ID_SDMMC0;
131
Przemyslaw Marczak96094d42015-10-28 15:41:50 +0100132 ret = exynos_pinmux_config(dev_id, flag);
133 if (ret) {
134 printf("external SD not configured\n");
135 return ret;
136 }
137
Simon Glass03479602015-01-05 20:05:38 -0700138 if (dm_gpio_is_valid(&host->pwr_gpio)) {
139 dm_gpio_set_value(&host->pwr_gpio, 1);
Tobias Jakobi2308ea72015-10-05 13:47:53 +0200140 ret = exynos_pinmux_config(dev_id, flag);
141 if (ret) {
Piotr Wilczek3577fe82014-03-07 14:59:41 +0100142 debug("MMC not configured\n");
Tobias Jakobi2308ea72015-10-05 13:47:53 +0200143 return ret;
Piotr Wilczek3577fe82014-03-07 14:59:41 +0100144 }
145 }
146
Simon Glass03479602015-01-05 20:05:38 -0700147 if (dm_gpio_is_valid(&host->cd_gpio)) {
Tobias Jakobi2308ea72015-10-05 13:47:53 +0200148 ret = dm_gpio_get_value(&host->cd_gpio);
149 if (ret) {
150 debug("no SD card detected (%d)\n", ret);
Piotr Wilczek3577fe82014-03-07 14:59:41 +0100151 return -ENODEV;
Tobias Jakobi2308ea72015-10-05 13:47:53 +0200152 }
Piotr Wilczek3577fe82014-03-07 14:59:41 +0100153 }
154
Jaehoon Chung9b8c9a32014-05-16 13:59:59 +0900155 return s5p_sdhci_core_init(host);
Piotr Wilczek3577fe82014-03-07 14:59:41 +0100156}
157
158static int sdhci_get_config(const void *blob, int node, struct sdhci_host *host)
159{
160 int bus_width, dev_id;
161 unsigned int base;
162
163 /* Get device id */
164 dev_id = pinmux_decode_periph_id(blob, node);
Seung-Woo Kimf0ecfc52016-11-24 15:05:51 +0900165 if (dev_id < PERIPH_ID_SDMMC0 || dev_id > PERIPH_ID_SDMMC3) {
Piotr Wilczek3577fe82014-03-07 14:59:41 +0100166 debug("MMC: Can't get device id\n");
Jaehoon Chung2cb5d672016-09-26 08:10:02 +0900167 return -EINVAL;
Piotr Wilczek3577fe82014-03-07 14:59:41 +0100168 }
169 host->index = dev_id - PERIPH_ID_SDMMC0;
170
171 /* Get bus width */
172 bus_width = fdtdec_get_int(blob, node, "samsung,bus-width", 0);
173 if (bus_width <= 0) {
174 debug("MMC: Can't get bus-width\n");
Jaehoon Chung2cb5d672016-09-26 08:10:02 +0900175 return -EINVAL;
Piotr Wilczek3577fe82014-03-07 14:59:41 +0100176 }
177 host->bus_width = bus_width;
178
179 /* Get the base address from the device node */
180 base = fdtdec_get_addr(blob, node, "reg");
181 if (!base) {
182 debug("MMC: Can't get base address\n");
Jaehoon Chung2cb5d672016-09-26 08:10:02 +0900183 return -EINVAL;
Piotr Wilczek3577fe82014-03-07 14:59:41 +0100184 }
185 host->ioaddr = (void *)base;
186
Simon Glass03479602015-01-05 20:05:38 -0700187 gpio_request_by_name_nodev(blob, node, "pwr-gpios", 0, &host->pwr_gpio,
188 GPIOD_IS_OUT);
189 gpio_request_by_name_nodev(blob, node, "cd-gpios", 0, &host->cd_gpio,
190 GPIOD_IS_IN);
Piotr Wilczek3577fe82014-03-07 14:59:41 +0100191
192 return 0;
193}
194
195static int process_nodes(const void *blob, int node_list[], int count)
196{
197 struct sdhci_host *host;
Tobias Jakobi995a54c2015-10-05 13:47:52 +0200198 int i, node, ret;
Tobias Jakobi6a9fbb62015-10-05 13:47:51 +0200199 int failed = 0;
Piotr Wilczek3577fe82014-03-07 14:59:41 +0100200
201 debug("%s: count = %d\n", __func__, count);
202
203 /* build sdhci_host[] for each controller */
204 for (i = 0; i < count; i++) {
205 node = node_list[i];
206 if (node <= 0)
207 continue;
208
209 host = &sdhci_host[i];
210
Tobias Jakobi995a54c2015-10-05 13:47:52 +0200211 ret = sdhci_get_config(blob, node, host);
212 if (ret) {
213 printf("%s: failed to decode dev %d (%d)\n", __func__, i, ret);
Tobias Jakobi6a9fbb62015-10-05 13:47:51 +0200214 failed++;
215 continue;
Piotr Wilczek3577fe82014-03-07 14:59:41 +0100216 }
Tobias Jakobi6a9fbb62015-10-05 13:47:51 +0200217
Tobias Jakobi995a54c2015-10-05 13:47:52 +0200218 ret = do_sdhci_init(host);
Przemyslaw Marczak96094d42015-10-28 15:41:50 +0100219 if (ret && ret != -ENODEV) {
Tobias Jakobi995a54c2015-10-05 13:47:52 +0200220 printf("%s: failed to initialize dev %d (%d)\n", __func__, i, ret);
Tobias Jakobi6a9fbb62015-10-05 13:47:51 +0200221 failed++;
222 }
Piotr Wilczek3577fe82014-03-07 14:59:41 +0100223 }
Tobias Jakobi6a9fbb62015-10-05 13:47:51 +0200224
225 /* we only consider it an error when all nodes fail */
226 return (failed == count ? -1 : 0);
Piotr Wilczek3577fe82014-03-07 14:59:41 +0100227}
228
229int exynos_mmc_init(const void *blob)
230{
231 int count;
232 int node_list[SDHCI_MAX_HOSTS];
233
234 count = fdtdec_find_aliases_for_id(blob, "mmc",
235 COMPAT_SAMSUNG_EXYNOS_MMC, node_list,
236 SDHCI_MAX_HOSTS);
237
Tobias Jakobi6a9fbb62015-10-05 13:47:51 +0200238 return process_nodes(blob, node_list, count);
Piotr Wilczek3577fe82014-03-07 14:59:41 +0100239}
240#endif
Jaehoon Chung7aedafd2016-09-09 18:23:23 +0900241
242#ifdef CONFIG_DM_MMC
243static int s5p_sdhci_probe(struct udevice *dev)
244{
245 struct s5p_sdhci_plat *plat = dev_get_platdata(dev);
246 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
247 struct sdhci_host *host = dev_get_priv(dev);
248 int ret;
249
250 ret = sdhci_get_config(gd->fdt_blob, dev->of_offset, host);
251 if (ret)
252 return ret;
253
254 ret = do_sdhci_init(host);
255 if (ret)
256 return ret;
257
Stefan Herbrechtsmeier6d0e34b2017-01-17 15:58:48 +0100258 ret = sdhci_setup_cfg(&plat->cfg, host, 0, 400000);
Jaehoon Chung7aedafd2016-09-09 18:23:23 +0900259 if (ret)
260 return ret;
261
262 host->mmc = &plat->mmc;
263 host->mmc->priv = host;
264 host->mmc->dev = dev;
265 upriv->mmc = host->mmc;
266
267 return sdhci_probe(dev);
268}
269
270static int s5p_sdhci_bind(struct udevice *dev)
271{
272 struct s5p_sdhci_plat *plat = dev_get_platdata(dev);
273 int ret;
274
275 ret = sdhci_bind(dev, &plat->mmc, &plat->cfg);
276 if (ret)
277 return ret;
278
279 return 0;
280}
281
282static const struct udevice_id s5p_sdhci_ids[] = {
283 { .compatible = "samsung,exynos4412-sdhci"},
284 { }
285};
286
287U_BOOT_DRIVER(s5p_sdhci_drv) = {
288 .name = "s5p_sdhci",
289 .id = UCLASS_MMC,
290 .of_match = s5p_sdhci_ids,
291 .bind = s5p_sdhci_bind,
292 .ops = &sdhci_ops,
293 .probe = s5p_sdhci_probe,
294 .priv_auto_alloc_size = sizeof(struct sdhci_host),
295 .platdata_auto_alloc_size = sizeof(struct s5p_sdhci_plat),
296};
297#endif /* CONFIG_DM_MMC */