diff options
Diffstat (limited to 'arch/arm/mach-omap2/usb-musb.c')
| -rw-r--r-- | arch/arm/mach-omap2/usb-musb.c | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/usb-musb.c b/arch/arm/mach-omap2/usb-musb.c new file mode 100644 index 000000000000..fc74e913c415 --- /dev/null +++ b/arch/arm/mach-omap2/usb-musb.c @@ -0,0 +1,187 @@ +/* + * linux/arch/arm/mach-omap2/usb-musb.c + * + * This file will contain the board specific details for the + * MENTOR USB OTG controller on OMAP3430 + * + * Copyright (C) 2007-2008 Texas Instruments + * Copyright (C) 2008 Nokia Corporation + * Author: Vikram Pandita + * + * Generalization by: + * Felipe Balbi <felipe.balbi@nokia.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/clk.h> +#include <linux/dma-mapping.h> +#include <linux/io.h> + +#include <linux/usb/musb.h> + +#include <mach/hardware.h> +#include <mach/irqs.h> +#include <mach/pm.h> +#include <mach/mux.h> +#include <mach/usb.h> + +static struct resource musb_resources[] = { + [0] = { /* start and end set dynamically */ + .flags = IORESOURCE_MEM, + }, + [1] = { /* general IRQ */ + .start = INT_243X_HS_USB_MC, + .flags = IORESOURCE_IRQ, + }, + [2] = { /* DMA IRQ */ + .start = INT_243X_HS_USB_DMA, + .flags = IORESOURCE_IRQ, + }, +}; + +static int clk_on; + +static int musb_set_clock(struct clk *clk, int state) +{ + if (state) { + if (clk_on > 0) + return -ENODEV; + + clk_enable(clk); + clk_on = 1; + } else { + if (clk_on == 0) + return -ENODEV; + + clk_disable(clk); + clk_on = 0; + } + + return 0; +} + +static struct musb_hdrc_eps_bits musb_eps[] = { + { "ep1_tx", 10, }, + { "ep1_rx", 10, }, + { "ep2_tx", 9, }, + { "ep2_rx", 9, }, + { "ep3_tx", 3, }, + { "ep3_rx", 3, }, + { "ep4_tx", 3, }, + { "ep4_rx", 3, }, + { "ep5_tx", 3, }, + { "ep5_rx", 3, }, + { "ep6_tx", 3, }, + { "ep6_rx", 3, }, + { "ep7_tx", 3, }, + { "ep7_rx", 3, }, + { "ep8_tx", 2, }, + { "ep8_rx", 2, }, + { "ep9_tx", 2, }, + { "ep9_rx", 2, }, + { "ep10_tx", 2, }, + { "ep10_rx", 2, }, + { "ep11_tx", 2, }, + { "ep11_rx", 2, }, + { "ep12_tx", 2, }, + { "ep12_rx", 2, }, + { "ep13_tx", 2, }, + { "ep13_rx", 2, }, + { "ep14_tx", 2, }, + { "ep14_rx", 2, }, + { "ep15_tx", 2, }, + { "ep15_rx", 2, }, +}; + +static struct musb_hdrc_config musb_config = { + .multipoint = 1, + .dyn_fifo = 1, + .soft_con = 1, + .dma = 1, + .num_eps = 16, + .dma_channels = 7, + .dma_req_chan = (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3), + .ram_bits = 12, + .eps_bits = musb_eps, +}; + +static struct musb_hdrc_platform_data musb_plat = { +#ifdef CONFIG_USB_MUSB_OTG + .mode = MUSB_OTG, +#elif defined(CONFIG_USB_MUSB_HDRC_HCD) + .mode = MUSB_HOST, +#elif defined(CONFIG_USB_GADGET_MUSB_HDRC) + .mode = MUSB_PERIPHERAL, +#endif + /* .clock is set dynamically */ + .set_clock = musb_set_clock, + .config = &musb_config, + + /* REVISIT charge pump on TWL4030 can supply up to + * 100 mA ... but this value is board-specific, like + * "mode", and should be passed to usb_musb_init(). + */ + .power = 50, /* up to 100 mA */ +}; + +static u64 musb_dmamask = DMA_32BIT_MASK; + +static struct platform_device musb_device = { + .name = "musb_hdrc", + .id = -1, + .dev = { + .dma_mask = &musb_dmamask, + .coherent_dma_mask = DMA_32BIT_MASK, + .platform_data = &musb_plat, + }, + .num_resources = ARRAY_SIZE(musb_resources), + .resource = musb_resources, +}; + +#ifdef CONFIG_NOP_USB_XCEIV +static u64 nop_xceiv_dmamask = DMA_32BIT_MASK; + +static struct platform_device nop_xceiv_device = { + .name = "nop_usb_xceiv", + .id = -1, + .dev = { + .dma_mask = &nop_xceiv_dmamask, + .coherent_dma_mask = DMA_32BIT_MASK, + .platform_data = NULL, + }, +}; +#endif + +void __init usb_musb_init(void) +{ + if (cpu_is_omap243x()) + musb_resources[0].start = OMAP243X_HS_BASE; + else + musb_resources[0].start = OMAP34XX_HSUSB_OTG_BASE; + musb_resources[0].end = musb_resources[0].start + SZ_8K - 1; + + /* + * REVISIT: This line can be removed once all the platforms using + * musb_core.c have been converted to use use clkdev. + */ + musb_plat.clock = "ick"; + +#ifdef CONFIG_NOP_USB_XCEIV + if (platform_device_register(&nop_xceiv_device) < 0) { + printk(KERN_ERR "Unable to register NOP-XCEIV device\n"); + return; + } +#endif + + if (platform_device_register(&musb_device) < 0) { + printk(KERN_ERR "Unable to register HS-USB (MUSB) device\n"); + return; + } +} |