Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mach-omap2/usb-musb.c |
| 3 | * |
| 4 | * This file will contain the board specific details for the |
| 5 | * MENTOR USB OTG controller on OMAP3430 |
| 6 | * |
| 7 | * Copyright (C) 2007-2008 Texas Instruments |
| 8 | * Copyright (C) 2008 Nokia Corporation |
| 9 | * Author: Vikram Pandita |
| 10 | * |
| 11 | * Generalization by: |
| 12 | * Felipe Balbi <felipe.balbi@nokia.com> |
| 13 | * |
| 14 | * This program is free software; you can redistribute it and/or modify |
| 15 | * it under the terms of the GNU General Public License version 2 as |
| 16 | * published by the Free Software Foundation. |
| 17 | */ |
| 18 | |
| 19 | #include <linux/types.h> |
| 20 | #include <linux/errno.h> |
| 21 | #include <linux/delay.h> |
| 22 | #include <linux/platform_device.h> |
| 23 | #include <linux/clk.h> |
| 24 | #include <linux/dma-mapping.h> |
| 25 | #include <linux/io.h> |
| 26 | |
| 27 | #include <linux/usb/musb.h> |
| 28 | |
| 29 | #include <mach/hardware.h> |
| 30 | #include <mach/irqs.h> |
Ajay Kumar Gupta | 3a0d30b | 2010-10-19 10:08:11 +0300 | [diff] [blame] | 31 | #include <mach/am35xx.h> |
Tony Lindgren | ce491cf | 2009-10-20 09:40:47 -0700 | [diff] [blame] | 32 | #include <plat/usb.h> |
Ajay Kumar Gupta | a9c0378 | 2010-12-07 18:57:45 +0530 | [diff] [blame] | 33 | #include "control.h" |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 34 | |
Felipe Balbi | 7c92554 | 2010-12-01 14:23:48 +0200 | [diff] [blame] | 35 | #if defined(CONFIG_USB_MUSB_OMAP2PLUS) || defined (CONFIG_USB_MUSB_AM35X) |
Peter 'p2' De Schrijver | 94a3ef6 | 2009-01-19 19:09:22 +0200 | [diff] [blame] | 36 | |
Ajay Kumar Gupta | a9c0378 | 2010-12-07 18:57:45 +0530 | [diff] [blame] | 37 | static void am35x_musb_reset(void) |
| 38 | { |
| 39 | u32 regval; |
| 40 | |
| 41 | /* Reset the musb interface */ |
| 42 | regval = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET); |
| 43 | |
| 44 | regval |= AM35XX_USBOTGSS_SW_RST; |
| 45 | omap_ctrl_writel(regval, AM35XX_CONTROL_IP_SW_RESET); |
| 46 | |
| 47 | regval &= ~AM35XX_USBOTGSS_SW_RST; |
| 48 | omap_ctrl_writel(regval, AM35XX_CONTROL_IP_SW_RESET); |
| 49 | |
| 50 | regval = omap_ctrl_readl(AM35XX_CONTROL_IP_SW_RESET); |
| 51 | } |
| 52 | |
| 53 | static void am35x_musb_phy_power(u8 on) |
| 54 | { |
| 55 | unsigned long timeout = jiffies + msecs_to_jiffies(100); |
| 56 | u32 devconf2; |
| 57 | |
| 58 | if (on) { |
| 59 | /* |
| 60 | * Start the on-chip PHY and its PLL. |
| 61 | */ |
| 62 | devconf2 = omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2); |
| 63 | |
| 64 | devconf2 &= ~(CONF2_RESET | CONF2_PHYPWRDN | CONF2_OTGPWRDN); |
| 65 | devconf2 |= CONF2_PHY_PLLON; |
| 66 | |
| 67 | omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2); |
| 68 | |
| 69 | pr_info(KERN_INFO "Waiting for PHY clock good...\n"); |
| 70 | while (!(omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2) |
| 71 | & CONF2_PHYCLKGD)) { |
| 72 | cpu_relax(); |
| 73 | |
| 74 | if (time_after(jiffies, timeout)) { |
| 75 | pr_err(KERN_ERR "musb PHY clock good timed out\n"); |
| 76 | break; |
| 77 | } |
| 78 | } |
| 79 | } else { |
| 80 | /* |
| 81 | * Power down the on-chip PHY. |
| 82 | */ |
| 83 | devconf2 = omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2); |
| 84 | |
| 85 | devconf2 &= ~CONF2_PHY_PLLON; |
| 86 | devconf2 |= CONF2_PHYPWRDN | CONF2_OTGPWRDN; |
| 87 | omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2); |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | static void am35x_musb_clear_irq(void) |
| 92 | { |
| 93 | u32 regval; |
| 94 | |
| 95 | regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR); |
| 96 | regval |= AM35XX_USBOTGSS_INT_CLR; |
| 97 | omap_ctrl_writel(regval, AM35XX_CONTROL_LVL_INTR_CLEAR); |
| 98 | regval = omap_ctrl_readl(AM35XX_CONTROL_LVL_INTR_CLEAR); |
| 99 | } |
| 100 | |
| 101 | static void am35x_musb_set_mode(u8 musb_mode) |
| 102 | { |
| 103 | u32 devconf2 = omap_ctrl_readl(AM35XX_CONTROL_DEVCONF2); |
| 104 | |
| 105 | devconf2 &= ~CONF2_OTGMODE; |
| 106 | switch (musb_mode) { |
| 107 | #ifdef CONFIG_USB_MUSB_HDRC_HCD |
| 108 | case MUSB_HOST: /* Force VBUS valid, ID = 0 */ |
| 109 | devconf2 |= CONF2_FORCE_HOST; |
| 110 | break; |
| 111 | #endif |
| 112 | #ifdef CONFIG_USB_GADGET_MUSB_HDRC |
| 113 | case MUSB_PERIPHERAL: /* Force VBUS valid, ID = 1 */ |
| 114 | devconf2 |= CONF2_FORCE_DEVICE; |
| 115 | break; |
| 116 | #endif |
| 117 | #ifdef CONFIG_USB_MUSB_OTG |
| 118 | case MUSB_OTG: /* Don't override the VBUS/ID comparators */ |
| 119 | devconf2 |= CONF2_NO_OVERRIDE; |
| 120 | break; |
| 121 | #endif |
| 122 | default: |
| 123 | pr_info(KERN_INFO "Unsupported mode %u\n", musb_mode); |
| 124 | } |
| 125 | |
| 126 | omap_ctrl_writel(devconf2, AM35XX_CONTROL_DEVCONF2); |
| 127 | } |
| 128 | |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 129 | static struct resource musb_resources[] = { |
| 130 | [0] = { /* start and end set dynamically */ |
| 131 | .flags = IORESOURCE_MEM, |
| 132 | }, |
| 133 | [1] = { /* general IRQ */ |
| 134 | .start = INT_243X_HS_USB_MC, |
| 135 | .flags = IORESOURCE_IRQ, |
Hema Kalliguddi | fcf173e | 2010-09-29 11:26:39 -0500 | [diff] [blame] | 136 | .name = "mc", |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 137 | }, |
| 138 | [2] = { /* DMA IRQ */ |
| 139 | .start = INT_243X_HS_USB_DMA, |
| 140 | .flags = IORESOURCE_IRQ, |
Hema Kalliguddi | fcf173e | 2010-09-29 11:26:39 -0500 | [diff] [blame] | 141 | .name = "dma", |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 142 | }, |
| 143 | }; |
| 144 | |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 145 | static struct musb_hdrc_config musb_config = { |
| 146 | .multipoint = 1, |
| 147 | .dyn_fifo = 1, |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 148 | .num_eps = 16, |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 149 | .ram_bits = 12, |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 150 | }; |
| 151 | |
| 152 | static struct musb_hdrc_platform_data musb_plat = { |
| 153 | #ifdef CONFIG_USB_MUSB_OTG |
| 154 | .mode = MUSB_OTG, |
| 155 | #elif defined(CONFIG_USB_MUSB_HDRC_HCD) |
| 156 | .mode = MUSB_HOST, |
| 157 | #elif defined(CONFIG_USB_GADGET_MUSB_HDRC) |
| 158 | .mode = MUSB_PERIPHERAL, |
| 159 | #endif |
| 160 | /* .clock is set dynamically */ |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 161 | .config = &musb_config, |
| 162 | |
| 163 | /* REVISIT charge pump on TWL4030 can supply up to |
| 164 | * 100 mA ... but this value is board-specific, like |
| 165 | * "mode", and should be passed to usb_musb_init(). |
| 166 | */ |
| 167 | .power = 50, /* up to 100 mA */ |
| 168 | }; |
| 169 | |
Yang Hongyang | e930438 | 2009-04-13 14:40:14 -0700 | [diff] [blame] | 170 | static u64 musb_dmamask = DMA_BIT_MASK(32); |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 171 | |
| 172 | static struct platform_device musb_device = { |
Felipe Balbi | dc09886 | 2010-12-01 15:01:11 +0200 | [diff] [blame] | 173 | .name = "musb-omap2430", |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 174 | .id = -1, |
| 175 | .dev = { |
| 176 | .dma_mask = &musb_dmamask, |
Yang Hongyang | e930438 | 2009-04-13 14:40:14 -0700 | [diff] [blame] | 177 | .coherent_dma_mask = DMA_BIT_MASK(32), |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 178 | .platform_data = &musb_plat, |
| 179 | }, |
| 180 | .num_resources = ARRAY_SIZE(musb_resources), |
| 181 | .resource = musb_resources, |
| 182 | }; |
| 183 | |
Maulik Mankad | 884b8369 | 2010-02-17 14:09:30 -0800 | [diff] [blame] | 184 | void __init usb_musb_init(struct omap_musb_board_data *board_data) |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 185 | { |
Maulik Mankad | bce0668 | 2010-02-17 14:09:32 -0800 | [diff] [blame] | 186 | if (cpu_is_omap243x()) { |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 187 | musb_resources[0].start = OMAP243X_HS_BASE; |
Ajay Kumar Gupta | 3a0d30b | 2010-10-19 10:08:11 +0300 | [diff] [blame] | 188 | } else if (cpu_is_omap3517() || cpu_is_omap3505()) { |
Felipe Balbi | ce40c57 | 2010-12-02 09:06:51 +0200 | [diff] [blame] | 189 | musb_device.name = "musb-am35x"; |
Ajay Kumar Gupta | 3a0d30b | 2010-10-19 10:08:11 +0300 | [diff] [blame] | 190 | musb_resources[0].start = AM35XX_IPSS_USBOTGSS_BASE; |
| 191 | musb_resources[1].start = INT_35XX_USBOTG_IRQ; |
Ajay Kumar Gupta | a9c0378 | 2010-12-07 18:57:45 +0530 | [diff] [blame] | 192 | board_data->set_phy_power = am35x_musb_phy_power; |
| 193 | board_data->clear_irq = am35x_musb_clear_irq; |
| 194 | board_data->set_mode = am35x_musb_set_mode; |
| 195 | board_data->reset = am35x_musb_reset; |
Maulik Mankad | bce0668 | 2010-02-17 14:09:32 -0800 | [diff] [blame] | 196 | } else if (cpu_is_omap34xx()) { |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 197 | musb_resources[0].start = OMAP34XX_HSUSB_OTG_BASE; |
Maulik Mankad | bce0668 | 2010-02-17 14:09:32 -0800 | [diff] [blame] | 198 | } else if (cpu_is_omap44xx()) { |
| 199 | musb_resources[0].start = OMAP44XX_HSUSB_OTG_BASE; |
Santosh Shilimkar | 5772ca7 | 2010-02-18 03:14:12 +0530 | [diff] [blame] | 200 | musb_resources[1].start = OMAP44XX_IRQ_HS_USB_MC_N; |
| 201 | musb_resources[2].start = OMAP44XX_IRQ_HS_USB_DMA_N; |
Maulik Mankad | bce0668 | 2010-02-17 14:09:32 -0800 | [diff] [blame] | 202 | } |
Felipe Balbi | f982855 | 2010-02-17 14:09:29 -0800 | [diff] [blame] | 203 | musb_resources[0].end = musb_resources[0].start + SZ_4K - 1; |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 204 | |
| 205 | /* |
| 206 | * REVISIT: This line can be removed once all the platforms using |
| 207 | * musb_core.c have been converted to use use clkdev. |
| 208 | */ |
| 209 | musb_plat.clock = "ick"; |
Maulik Mankad | 884b8369 | 2010-02-17 14:09:30 -0800 | [diff] [blame] | 210 | musb_plat.board_data = board_data; |
| 211 | musb_plat.power = board_data->power >> 1; |
| 212 | musb_plat.mode = board_data->mode; |
Ajay Kumar Gupta | 58815fa | 2010-03-25 13:25:27 +0200 | [diff] [blame] | 213 | musb_plat.extvbus = board_data->extvbus; |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 214 | |
Felipe Balbi | bdfa351 | 2010-02-17 14:09:31 -0800 | [diff] [blame] | 215 | if (platform_device_register(&musb_device) < 0) |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 216 | printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n"); |
Felipe Balbi | 18cb7ac | 2009-03-23 18:34:06 -0700 | [diff] [blame] | 217 | } |
Peter 'p2' De Schrijver | 94a3ef6 | 2009-01-19 19:09:22 +0200 | [diff] [blame] | 218 | |
| 219 | #else |
Maulik Mankad | 884b8369 | 2010-02-17 14:09:30 -0800 | [diff] [blame] | 220 | void __init usb_musb_init(struct omap_musb_board_data *board_data) |
Peter 'p2' De Schrijver | 94a3ef6 | 2009-01-19 19:09:22 +0200 | [diff] [blame] | 221 | { |
Peter 'p2' De Schrijver | 94a3ef6 | 2009-01-19 19:09:22 +0200 | [diff] [blame] | 222 | } |
| 223 | #endif /* CONFIG_USB_MUSB_SOC */ |