Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 1 | /** |
| 2 | * omap-usb-tll.c - The USB TLL driver for OMAP EHCI & OHCI |
| 3 | * |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 4 | * Copyright (C) 2012-2013 Texas Instruments Incorporated - http://www.ti.com |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 5 | * Author: Keshava Munegowda <keshava_mgowda@ti.com> |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 6 | * Author: Roger Quadros <rogerq@ti.com> |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 7 | * |
| 8 | * This program is free software: you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 of |
| 10 | * the License as published by the Free Software Foundation. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU 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, see <http://www.gnu.org/licenses/>. |
| 19 | */ |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/types.h> |
| 23 | #include <linux/slab.h> |
| 24 | #include <linux/spinlock.h> |
| 25 | #include <linux/platform_device.h> |
| 26 | #include <linux/clk.h> |
| 27 | #include <linux/io.h> |
| 28 | #include <linux/err.h> |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 29 | #include <linux/pm_runtime.h> |
Felipe Balbi | e8c4a7a | 2012-10-24 14:26:19 -0700 | [diff] [blame] | 30 | #include <linux/platform_data/usb-omap.h> |
Roger Quadros | 48130b8 | 2013-01-29 15:20:55 +0200 | [diff] [blame] | 31 | #include <linux/of.h> |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 32 | |
| 33 | #define USBTLL_DRIVER_NAME "usbhs_tll" |
| 34 | |
| 35 | /* TLL Register Set */ |
| 36 | #define OMAP_USBTLL_REVISION (0x00) |
| 37 | #define OMAP_USBTLL_SYSCONFIG (0x10) |
| 38 | #define OMAP_USBTLL_SYSCONFIG_CACTIVITY (1 << 8) |
| 39 | #define OMAP_USBTLL_SYSCONFIG_SIDLEMODE (1 << 3) |
| 40 | #define OMAP_USBTLL_SYSCONFIG_ENAWAKEUP (1 << 2) |
| 41 | #define OMAP_USBTLL_SYSCONFIG_SOFTRESET (1 << 1) |
| 42 | #define OMAP_USBTLL_SYSCONFIG_AUTOIDLE (1 << 0) |
| 43 | |
| 44 | #define OMAP_USBTLL_SYSSTATUS (0x14) |
| 45 | #define OMAP_USBTLL_SYSSTATUS_RESETDONE (1 << 0) |
| 46 | |
| 47 | #define OMAP_USBTLL_IRQSTATUS (0x18) |
| 48 | #define OMAP_USBTLL_IRQENABLE (0x1C) |
| 49 | |
| 50 | #define OMAP_TLL_SHARED_CONF (0x30) |
| 51 | #define OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN (1 << 6) |
| 52 | #define OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN (1 << 5) |
| 53 | #define OMAP_TLL_SHARED_CONF_USB_DIVRATION (1 << 2) |
| 54 | #define OMAP_TLL_SHARED_CONF_FCLK_REQ (1 << 1) |
| 55 | #define OMAP_TLL_SHARED_CONF_FCLK_IS_ON (1 << 0) |
| 56 | |
| 57 | #define OMAP_TLL_CHANNEL_CONF(num) (0x040 + 0x004 * num) |
| 58 | #define OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT 24 |
Roger Quadros | 300c2f8 | 2012-11-08 16:10:41 +0200 | [diff] [blame] | 59 | #define OMAP_TLL_CHANNEL_CONF_DRVVBUS (1 << 16) |
| 60 | #define OMAP_TLL_CHANNEL_CONF_CHRGVBUS (1 << 15) |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 61 | #define OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF (1 << 11) |
| 62 | #define OMAP_TLL_CHANNEL_CONF_ULPI_ULPIAUTOIDLE (1 << 10) |
| 63 | #define OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE (1 << 9) |
| 64 | #define OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE (1 << 8) |
Roger Quadros | 300c2f8 | 2012-11-08 16:10:41 +0200 | [diff] [blame] | 65 | #define OMAP_TLL_CHANNEL_CONF_MODE_TRANSPARENT_UTMI (2 << 1) |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 66 | #define OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS (1 << 1) |
| 67 | #define OMAP_TLL_CHANNEL_CONF_CHANEN (1 << 0) |
| 68 | |
| 69 | #define OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0 0x0 |
| 70 | #define OMAP_TLL_FSLSMODE_6PIN_PHY_DP_DM 0x1 |
| 71 | #define OMAP_TLL_FSLSMODE_3PIN_PHY 0x2 |
| 72 | #define OMAP_TLL_FSLSMODE_4PIN_PHY 0x3 |
| 73 | #define OMAP_TLL_FSLSMODE_6PIN_TLL_DAT_SE0 0x4 |
| 74 | #define OMAP_TLL_FSLSMODE_6PIN_TLL_DP_DM 0x5 |
| 75 | #define OMAP_TLL_FSLSMODE_3PIN_TLL 0x6 |
| 76 | #define OMAP_TLL_FSLSMODE_4PIN_TLL 0x7 |
| 77 | #define OMAP_TLL_FSLSMODE_2PIN_TLL_DAT_SE0 0xA |
| 78 | #define OMAP_TLL_FSLSMODE_2PIN_DAT_DP_DM 0xB |
| 79 | |
| 80 | #define OMAP_TLL_ULPI_FUNCTION_CTRL(num) (0x804 + 0x100 * num) |
| 81 | #define OMAP_TLL_ULPI_INTERFACE_CTRL(num) (0x807 + 0x100 * num) |
| 82 | #define OMAP_TLL_ULPI_OTG_CTRL(num) (0x80A + 0x100 * num) |
| 83 | #define OMAP_TLL_ULPI_INT_EN_RISE(num) (0x80D + 0x100 * num) |
| 84 | #define OMAP_TLL_ULPI_INT_EN_FALL(num) (0x810 + 0x100 * num) |
| 85 | #define OMAP_TLL_ULPI_INT_STATUS(num) (0x813 + 0x100 * num) |
| 86 | #define OMAP_TLL_ULPI_INT_LATCH(num) (0x814 + 0x100 * num) |
| 87 | #define OMAP_TLL_ULPI_DEBUG(num) (0x815 + 0x100 * num) |
| 88 | #define OMAP_TLL_ULPI_SCRATCH_REGISTER(num) (0x816 + 0x100 * num) |
| 89 | |
| 90 | #define OMAP_REV2_TLL_CHANNEL_COUNT 2 |
| 91 | #define OMAP_TLL_CHANNEL_COUNT 3 |
| 92 | #define OMAP_TLL_CHANNEL_1_EN_MASK (1 << 0) |
| 93 | #define OMAP_TLL_CHANNEL_2_EN_MASK (1 << 1) |
| 94 | #define OMAP_TLL_CHANNEL_3_EN_MASK (1 << 2) |
| 95 | |
| 96 | /* Values of USBTLL_REVISION - Note: these are not given in the TRM */ |
| 97 | #define OMAP_USBTLL_REV1 0x00000015 /* OMAP3 */ |
| 98 | #define OMAP_USBTLL_REV2 0x00000018 /* OMAP 3630 */ |
| 99 | #define OMAP_USBTLL_REV3 0x00000004 /* OMAP4 */ |
Roger Quadros | 300c2f8 | 2012-11-08 16:10:41 +0200 | [diff] [blame] | 100 | #define OMAP_USBTLL_REV4 0x00000006 /* OMAP5 */ |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 101 | |
| 102 | #define is_ehci_tll_mode(x) (x == OMAP_EHCI_PORT_MODE_TLL) |
| 103 | |
Roger Quadros | 32a51f2 | 2012-11-08 14:40:45 +0200 | [diff] [blame] | 104 | /* only PHY and UNUSED modes don't need TLL */ |
| 105 | #define omap_usb_mode_needs_tll(x) ((x) != OMAP_USBHS_PORT_MODE_UNUSED &&\ |
| 106 | (x) != OMAP_EHCI_PORT_MODE_PHY) |
| 107 | |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 108 | struct usbtll_omap { |
Roger Quadros | 7e0ff103 | 2012-11-26 12:28:44 +0200 | [diff] [blame] | 109 | int nch; /* num. of channels */ |
Roger Quadros | 0bde3e9 | 2012-11-08 13:07:09 +0200 | [diff] [blame] | 110 | struct clk **ch_clk; |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 111 | void __iomem *base; |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 112 | }; |
| 113 | |
| 114 | /*-------------------------------------------------------------------------*/ |
| 115 | |
Roger Quadros | 7ed8619 | 2012-11-26 15:26:28 +0200 | [diff] [blame] | 116 | static const char usbtll_driver_name[] = USBTLL_DRIVER_NAME; |
| 117 | static struct device *tll_dev; |
Roger Quadros | 6675144 | 2012-11-26 16:56:26 +0200 | [diff] [blame] | 118 | static DEFINE_SPINLOCK(tll_lock); /* serialize access to tll_dev */ |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 119 | |
| 120 | /*-------------------------------------------------------------------------*/ |
| 121 | |
| 122 | static inline void usbtll_write(void __iomem *base, u32 reg, u32 val) |
| 123 | { |
Victor Kamensky | dd6eb26 | 2013-11-16 02:01:15 +0200 | [diff] [blame] | 124 | writel_relaxed(val, base + reg); |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 125 | } |
| 126 | |
| 127 | static inline u32 usbtll_read(void __iomem *base, u32 reg) |
| 128 | { |
Victor Kamensky | dd6eb26 | 2013-11-16 02:01:15 +0200 | [diff] [blame] | 129 | return readl_relaxed(base + reg); |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 130 | } |
| 131 | |
| 132 | static inline void usbtll_writeb(void __iomem *base, u8 reg, u8 val) |
| 133 | { |
Victor Kamensky | dd6eb26 | 2013-11-16 02:01:15 +0200 | [diff] [blame] | 134 | writeb_relaxed(val, base + reg); |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | static inline u8 usbtll_readb(void __iomem *base, u8 reg) |
| 138 | { |
Victor Kamensky | dd6eb26 | 2013-11-16 02:01:15 +0200 | [diff] [blame] | 139 | return readb_relaxed(base + reg); |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 140 | } |
| 141 | |
| 142 | /*-------------------------------------------------------------------------*/ |
| 143 | |
| 144 | static bool is_ohci_port(enum usbhs_omap_port_mode pmode) |
| 145 | { |
| 146 | switch (pmode) { |
| 147 | case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0: |
| 148 | case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM: |
| 149 | case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0: |
| 150 | case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM: |
| 151 | case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0: |
| 152 | case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM: |
| 153 | case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0: |
| 154 | case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM: |
| 155 | case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0: |
| 156 | case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM: |
| 157 | return true; |
| 158 | |
| 159 | default: |
| 160 | return false; |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | /* |
| 165 | * convert the port-mode enum to a value we can use in the FSLSMODE |
| 166 | * field of USBTLL_CHANNEL_CONF |
| 167 | */ |
| 168 | static unsigned ohci_omap3_fslsmode(enum usbhs_omap_port_mode mode) |
| 169 | { |
| 170 | switch (mode) { |
| 171 | case OMAP_USBHS_PORT_MODE_UNUSED: |
| 172 | case OMAP_OHCI_PORT_MODE_PHY_6PIN_DATSE0: |
| 173 | return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0; |
| 174 | |
| 175 | case OMAP_OHCI_PORT_MODE_PHY_6PIN_DPDM: |
| 176 | return OMAP_TLL_FSLSMODE_6PIN_PHY_DP_DM; |
| 177 | |
| 178 | case OMAP_OHCI_PORT_MODE_PHY_3PIN_DATSE0: |
| 179 | return OMAP_TLL_FSLSMODE_3PIN_PHY; |
| 180 | |
| 181 | case OMAP_OHCI_PORT_MODE_PHY_4PIN_DPDM: |
| 182 | return OMAP_TLL_FSLSMODE_4PIN_PHY; |
| 183 | |
| 184 | case OMAP_OHCI_PORT_MODE_TLL_6PIN_DATSE0: |
| 185 | return OMAP_TLL_FSLSMODE_6PIN_TLL_DAT_SE0; |
| 186 | |
| 187 | case OMAP_OHCI_PORT_MODE_TLL_6PIN_DPDM: |
| 188 | return OMAP_TLL_FSLSMODE_6PIN_TLL_DP_DM; |
| 189 | |
| 190 | case OMAP_OHCI_PORT_MODE_TLL_3PIN_DATSE0: |
| 191 | return OMAP_TLL_FSLSMODE_3PIN_TLL; |
| 192 | |
| 193 | case OMAP_OHCI_PORT_MODE_TLL_4PIN_DPDM: |
| 194 | return OMAP_TLL_FSLSMODE_4PIN_TLL; |
| 195 | |
| 196 | case OMAP_OHCI_PORT_MODE_TLL_2PIN_DATSE0: |
| 197 | return OMAP_TLL_FSLSMODE_2PIN_TLL_DAT_SE0; |
| 198 | |
| 199 | case OMAP_OHCI_PORT_MODE_TLL_2PIN_DPDM: |
| 200 | return OMAP_TLL_FSLSMODE_2PIN_DAT_DP_DM; |
| 201 | default: |
| 202 | pr_warn("Invalid port mode, using default\n"); |
| 203 | return OMAP_TLL_FSLSMODE_6PIN_PHY_DAT_SE0; |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | /** |
| 208 | * usbtll_omap_probe - initialize TI-based HCDs |
| 209 | * |
| 210 | * Allocates basic resources for this USB host controller. |
| 211 | */ |
Bill Pemberton | f791be4 | 2012-11-19 13:23:04 -0500 | [diff] [blame] | 212 | static int usbtll_omap_probe(struct platform_device *pdev) |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 213 | { |
| 214 | struct device *dev = &pdev->dev; |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 215 | struct resource *res; |
| 216 | struct usbtll_omap *tll; |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 217 | int ret = 0; |
Roger Quadros | 7e0ff103 | 2012-11-26 12:28:44 +0200 | [diff] [blame] | 218 | int i, ver; |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 219 | |
| 220 | dev_dbg(dev, "starting TI HSUSB TLL Controller\n"); |
| 221 | |
Roger Quadros | 1a7a8d7 | 2012-11-26 12:56:37 +0200 | [diff] [blame] | 222 | tll = devm_kzalloc(dev, sizeof(struct usbtll_omap), GFP_KERNEL); |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 223 | if (!tll) { |
| 224 | dev_err(dev, "Memory allocation failed\n"); |
Roger Quadros | 1a7a8d7 | 2012-11-26 12:56:37 +0200 | [diff] [blame] | 225 | return -ENOMEM; |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 226 | } |
| 227 | |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 228 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
Sachin Kamat | 651da3d | 2013-04-09 16:16:37 +0530 | [diff] [blame] | 229 | tll->base = devm_ioremap_resource(dev, res); |
| 230 | if (IS_ERR(tll->base)) |
| 231 | return PTR_ERR(tll->base); |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 232 | |
| 233 | platform_set_drvdata(pdev, tll); |
| 234 | pm_runtime_enable(dev); |
| 235 | pm_runtime_get_sync(dev); |
| 236 | |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 237 | ver = usbtll_read(tll->base, OMAP_USBTLL_REVISION); |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 238 | switch (ver) { |
| 239 | case OMAP_USBTLL_REV1: |
Roger Quadros | 300c2f8 | 2012-11-08 16:10:41 +0200 | [diff] [blame] | 240 | case OMAP_USBTLL_REV4: |
Roger Quadros | 7e0ff103 | 2012-11-26 12:28:44 +0200 | [diff] [blame] | 241 | tll->nch = OMAP_TLL_CHANNEL_COUNT; |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 242 | break; |
Roger Quadros | 7e0ff103 | 2012-11-26 12:28:44 +0200 | [diff] [blame] | 243 | case OMAP_USBTLL_REV2: |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 244 | case OMAP_USBTLL_REV3: |
Roger Quadros | 7e0ff103 | 2012-11-26 12:28:44 +0200 | [diff] [blame] | 245 | tll->nch = OMAP_REV2_TLL_CHANNEL_COUNT; |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 246 | break; |
| 247 | default: |
Roger Quadros | 7e0ff103 | 2012-11-26 12:28:44 +0200 | [diff] [blame] | 248 | tll->nch = OMAP_TLL_CHANNEL_COUNT; |
| 249 | dev_dbg(dev, |
| 250 | "USB TLL Rev : 0x%x not recognized, assuming %d channels\n", |
| 251 | ver, tll->nch); |
| 252 | break; |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 253 | } |
| 254 | |
Roger Quadros | 0bde3e9 | 2012-11-08 13:07:09 +0200 | [diff] [blame] | 255 | tll->ch_clk = devm_kzalloc(dev, sizeof(struct clk * [tll->nch]), |
| 256 | GFP_KERNEL); |
| 257 | if (!tll->ch_clk) { |
| 258 | ret = -ENOMEM; |
| 259 | dev_err(dev, "Couldn't allocate memory for channel clocks\n"); |
| 260 | goto err_clk_alloc; |
| 261 | } |
| 262 | |
| 263 | for (i = 0; i < tll->nch; i++) { |
| 264 | char clkname[] = "usb_tll_hs_usb_chx_clk"; |
| 265 | |
| 266 | snprintf(clkname, sizeof(clkname), |
| 267 | "usb_tll_hs_usb_ch%d_clk", i); |
| 268 | tll->ch_clk[i] = clk_get(dev, clkname); |
| 269 | |
| 270 | if (IS_ERR(tll->ch_clk[i])) |
| 271 | dev_dbg(dev, "can't get clock : %s\n", clkname); |
| 272 | } |
| 273 | |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 274 | pm_runtime_put_sync(dev); |
| 275 | /* only after this can omap_tll_enable/disable work */ |
| 276 | spin_lock(&tll_lock); |
| 277 | tll_dev = dev; |
| 278 | spin_unlock(&tll_lock); |
| 279 | |
| 280 | return 0; |
| 281 | |
| 282 | err_clk_alloc: |
| 283 | pm_runtime_put_sync(dev); |
| 284 | pm_runtime_disable(dev); |
| 285 | |
| 286 | return ret; |
| 287 | } |
| 288 | |
| 289 | /** |
| 290 | * usbtll_omap_remove - shutdown processing for UHH & TLL HCDs |
| 291 | * @pdev: USB Host Controller being removed |
| 292 | * |
| 293 | * Reverses the effect of usbtll_omap_probe(). |
| 294 | */ |
| 295 | static int usbtll_omap_remove(struct platform_device *pdev) |
| 296 | { |
| 297 | struct usbtll_omap *tll = platform_get_drvdata(pdev); |
| 298 | int i; |
| 299 | |
| 300 | spin_lock(&tll_lock); |
| 301 | tll_dev = NULL; |
| 302 | spin_unlock(&tll_lock); |
| 303 | |
| 304 | for (i = 0; i < tll->nch; i++) |
| 305 | if (!IS_ERR(tll->ch_clk[i])) |
| 306 | clk_put(tll->ch_clk[i]); |
| 307 | |
| 308 | pm_runtime_disable(&pdev->dev); |
| 309 | return 0; |
| 310 | } |
| 311 | |
Roger Quadros | 48130b8 | 2013-01-29 15:20:55 +0200 | [diff] [blame] | 312 | static const struct of_device_id usbtll_omap_dt_ids[] = { |
| 313 | { .compatible = "ti,usbhs-tll" }, |
| 314 | { } |
| 315 | }; |
| 316 | |
| 317 | MODULE_DEVICE_TABLE(of, usbtll_omap_dt_ids); |
| 318 | |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 319 | static struct platform_driver usbtll_omap_driver = { |
| 320 | .driver = { |
| 321 | .name = (char *)usbtll_driver_name, |
| 322 | .owner = THIS_MODULE, |
Sachin Kamat | 0f54e1e | 2013-10-15 09:18:50 +0530 | [diff] [blame] | 323 | .of_match_table = usbtll_omap_dt_ids, |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 324 | }, |
| 325 | .probe = usbtll_omap_probe, |
| 326 | .remove = usbtll_omap_remove, |
| 327 | }; |
| 328 | |
| 329 | int omap_tll_init(struct usbhs_omap_platform_data *pdata) |
| 330 | { |
| 331 | int i; |
| 332 | bool needs_tll; |
| 333 | unsigned reg; |
| 334 | struct usbtll_omap *tll; |
| 335 | |
| 336 | spin_lock(&tll_lock); |
| 337 | |
| 338 | if (!tll_dev) { |
| 339 | spin_unlock(&tll_lock); |
| 340 | return -ENODEV; |
| 341 | } |
| 342 | |
| 343 | tll = dev_get_drvdata(tll_dev); |
| 344 | |
Roger Quadros | 32a51f2 | 2012-11-08 14:40:45 +0200 | [diff] [blame] | 345 | needs_tll = false; |
| 346 | for (i = 0; i < tll->nch; i++) |
| 347 | needs_tll |= omap_usb_mode_needs_tll(pdata->port_mode[i]); |
| 348 | |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 349 | pm_runtime_get_sync(tll_dev); |
| 350 | |
Roger Quadros | 32a51f2 | 2012-11-08 14:40:45 +0200 | [diff] [blame] | 351 | if (needs_tll) { |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 352 | void __iomem *base = tll->base; |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 353 | |
| 354 | /* Program Common TLL register */ |
| 355 | reg = usbtll_read(base, OMAP_TLL_SHARED_CONF); |
| 356 | reg |= (OMAP_TLL_SHARED_CONF_FCLK_IS_ON |
| 357 | | OMAP_TLL_SHARED_CONF_USB_DIVRATION); |
| 358 | reg &= ~OMAP_TLL_SHARED_CONF_USB_90D_DDR_EN; |
| 359 | reg &= ~OMAP_TLL_SHARED_CONF_USB_180D_SDR_EN; |
| 360 | |
| 361 | usbtll_write(base, OMAP_TLL_SHARED_CONF, reg); |
| 362 | |
| 363 | /* Enable channels now */ |
Roger Quadros | 7e0ff103 | 2012-11-26 12:28:44 +0200 | [diff] [blame] | 364 | for (i = 0; i < tll->nch; i++) { |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 365 | reg = usbtll_read(base, OMAP_TLL_CHANNEL_CONF(i)); |
| 366 | |
| 367 | if (is_ohci_port(pdata->port_mode[i])) { |
| 368 | reg |= ohci_omap3_fslsmode(pdata->port_mode[i]) |
| 369 | << OMAP_TLL_CHANNEL_CONF_FSLSMODE_SHIFT; |
| 370 | reg |= OMAP_TLL_CHANNEL_CONF_CHANMODE_FSLS; |
| 371 | } else if (pdata->port_mode[i] == |
| 372 | OMAP_EHCI_PORT_MODE_TLL) { |
| 373 | /* |
| 374 | * Disable AutoIdle, BitStuffing |
| 375 | * and use SDR Mode |
| 376 | */ |
| 377 | reg &= ~(OMAP_TLL_CHANNEL_CONF_UTMIAUTOIDLE |
| 378 | | OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF |
| 379 | | OMAP_TLL_CHANNEL_CONF_ULPIDDRMODE); |
Roger Quadros | 300c2f8 | 2012-11-08 16:10:41 +0200 | [diff] [blame] | 380 | } else if (pdata->port_mode[i] == |
| 381 | OMAP_EHCI_PORT_MODE_HSIC) { |
| 382 | /* |
| 383 | * HSIC Mode requires UTMI port configurations |
| 384 | */ |
| 385 | reg |= OMAP_TLL_CHANNEL_CONF_DRVVBUS |
| 386 | | OMAP_TLL_CHANNEL_CONF_CHRGVBUS |
| 387 | | OMAP_TLL_CHANNEL_CONF_MODE_TRANSPARENT_UTMI |
| 388 | | OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF; |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 389 | } else { |
| 390 | continue; |
| 391 | } |
| 392 | reg |= OMAP_TLL_CHANNEL_CONF_CHANEN; |
| 393 | usbtll_write(base, OMAP_TLL_CHANNEL_CONF(i), reg); |
| 394 | |
| 395 | usbtll_writeb(base, |
| 396 | OMAP_TLL_ULPI_SCRATCH_REGISTER(i), |
| 397 | 0xbe); |
| 398 | } |
| 399 | } |
| 400 | |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 401 | pm_runtime_put_sync(tll_dev); |
| 402 | |
Roger Quadros | 6675144 | 2012-11-26 16:56:26 +0200 | [diff] [blame] | 403 | spin_unlock(&tll_lock); |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 404 | |
Roger Quadros | 1a7a8d7 | 2012-11-26 12:56:37 +0200 | [diff] [blame] | 405 | return 0; |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 406 | } |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 407 | EXPORT_SYMBOL_GPL(omap_tll_init); |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 408 | |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 409 | int omap_tll_enable(struct usbhs_omap_platform_data *pdata) |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 410 | { |
Roger Quadros | 0bde3e9 | 2012-11-08 13:07:09 +0200 | [diff] [blame] | 411 | int i; |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 412 | struct usbtll_omap *tll; |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 413 | |
Roger Quadros | 6675144 | 2012-11-26 16:56:26 +0200 | [diff] [blame] | 414 | spin_lock(&tll_lock); |
Roger Quadros | 7ed8619 | 2012-11-26 15:26:28 +0200 | [diff] [blame] | 415 | |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 416 | if (!tll_dev) { |
| 417 | spin_unlock(&tll_lock); |
| 418 | return -ENODEV; |
| 419 | } |
Roger Quadros | 0bde3e9 | 2012-11-08 13:07:09 +0200 | [diff] [blame] | 420 | |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 421 | tll = dev_get_drvdata(tll_dev); |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 422 | |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 423 | pm_runtime_get_sync(tll_dev); |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 424 | |
Roger Quadros | 0bde3e9 | 2012-11-08 13:07:09 +0200 | [diff] [blame] | 425 | for (i = 0; i < tll->nch; i++) { |
Roger Quadros | 32a51f2 | 2012-11-08 14:40:45 +0200 | [diff] [blame] | 426 | if (omap_usb_mode_needs_tll(pdata->port_mode[i])) { |
Roger Quadros | 0bde3e9 | 2012-11-08 13:07:09 +0200 | [diff] [blame] | 427 | int r; |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 428 | |
Roger Quadros | 0bde3e9 | 2012-11-08 13:07:09 +0200 | [diff] [blame] | 429 | if (IS_ERR(tll->ch_clk[i])) |
| 430 | continue; |
| 431 | |
Roger Quadros | b0e5992 | 2013-10-15 15:30:34 +0300 | [diff] [blame] | 432 | r = clk_prepare_enable(tll->ch_clk[i]); |
Roger Quadros | 0bde3e9 | 2012-11-08 13:07:09 +0200 | [diff] [blame] | 433 | if (r) { |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 434 | dev_err(tll_dev, |
Roger Quadros | 0bde3e9 | 2012-11-08 13:07:09 +0200 | [diff] [blame] | 435 | "Error enabling ch %d clock: %d\n", i, r); |
| 436 | } |
| 437 | } |
| 438 | } |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 439 | |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 440 | spin_unlock(&tll_lock); |
| 441 | |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 442 | return 0; |
| 443 | } |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 444 | EXPORT_SYMBOL_GPL(omap_tll_enable); |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 445 | |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 446 | int omap_tll_disable(struct usbhs_omap_platform_data *pdata) |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 447 | { |
Roger Quadros | 0bde3e9 | 2012-11-08 13:07:09 +0200 | [diff] [blame] | 448 | int i; |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 449 | struct usbtll_omap *tll; |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 450 | |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 451 | spin_lock(&tll_lock); |
| 452 | |
| 453 | if (!tll_dev) { |
| 454 | spin_unlock(&tll_lock); |
| 455 | return -ENODEV; |
| 456 | } |
| 457 | |
| 458 | tll = dev_get_drvdata(tll_dev); |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 459 | |
Roger Quadros | 0bde3e9 | 2012-11-08 13:07:09 +0200 | [diff] [blame] | 460 | for (i = 0; i < tll->nch; i++) { |
Roger Quadros | 32a51f2 | 2012-11-08 14:40:45 +0200 | [diff] [blame] | 461 | if (omap_usb_mode_needs_tll(pdata->port_mode[i])) { |
Roger Quadros | 0bde3e9 | 2012-11-08 13:07:09 +0200 | [diff] [blame] | 462 | if (!IS_ERR(tll->ch_clk[i])) |
Roger Quadros | b0e5992 | 2013-10-15 15:30:34 +0300 | [diff] [blame] | 463 | clk_disable_unprepare(tll->ch_clk[i]); |
Roger Quadros | 0bde3e9 | 2012-11-08 13:07:09 +0200 | [diff] [blame] | 464 | } |
| 465 | } |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 466 | |
Roger Quadros | 9f4a3ec | 2013-01-29 15:00:03 +0200 | [diff] [blame] | 467 | pm_runtime_put_sync(tll_dev); |
| 468 | |
| 469 | spin_unlock(&tll_lock); |
| 470 | |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 471 | return 0; |
| 472 | } |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 473 | EXPORT_SYMBOL_GPL(omap_tll_disable); |
| 474 | |
| 475 | MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>"); |
Roger Quadros | 48130b8 | 2013-01-29 15:20:55 +0200 | [diff] [blame] | 476 | MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>"); |
Keshava Munegowda | 16fa3dc | 2012-07-16 19:01:08 +0530 | [diff] [blame] | 477 | MODULE_ALIAS("platform:" USBHS_DRIVER_NAME); |
| 478 | MODULE_LICENSE("GPL v2"); |
| 479 | MODULE_DESCRIPTION("usb tll driver for TI OMAP EHCI and OHCI controllers"); |
| 480 | |
| 481 | static int __init omap_usbtll_drvinit(void) |
| 482 | { |
| 483 | return platform_driver_register(&usbtll_omap_driver); |
| 484 | } |
| 485 | |
| 486 | /* |
| 487 | * init before usbhs core driver; |
| 488 | * The usbtll driver should be initialized before |
| 489 | * the usbhs core driver probe function is called. |
| 490 | */ |
| 491 | fs_initcall(omap_usbtll_drvinit); |
| 492 | |
| 493 | static void __exit omap_usbtll_drvexit(void) |
| 494 | { |
| 495 | platform_driver_unregister(&usbtll_omap_driver); |
| 496 | } |
| 497 | module_exit(omap_usbtll_drvexit); |