/* * linux/arch/arm/mach-omap2/usb-tusb6010.c * * Copyright (C) 2006 Nokia Corporation * * 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 #include #include #include #include #include #include #include #include #include "gpmc.h" #include "mux.h" static u8 async_cs, sync_cs; static unsigned refclk_psec; /* NOTE: timings are from tusb 6010 datasheet Rev 1.8, 12-Sept 2006 */ static int tusb_set_async_mode(unsigned sysclk_ps) { struct gpmc_device_timings dev_t; struct gpmc_timings t; unsigned t_acsnh_advnh = sysclk_ps + 3000; memset(&dev_t, 0, sizeof(dev_t)); dev_t.mux = true; dev_t.t_ceasu = 8 * 1000; dev_t.t_avdasu = t_acsnh_advnh - 7000; dev_t.t_ce_avd = 1000; dev_t.t_avdp_r = t_acsnh_advnh; dev_t.t_oeasu = t_acsnh_advnh + 1000; dev_t.t_oe = 300; dev_t.t_cez_r = 7000; dev_t.t_cez_w = dev_t.t_cez_r; dev_t.t_avdp_w = t_acsnh_advnh; dev_t.t_weasu = t_acsnh_advnh + 1000; dev_t.t_wpl = 300; dev_t.cyc_aavdh_we = 1; gpmc_calc_timings(&t, &dev_t); return gpmc_cs_set_timings(async_cs, &t); } static int tusb_set_sync_mode(unsigned sysclk_ps) { struct gpmc_device_timings dev_t; struct gpmc_timings t; unsigned t_scsnh_advnh = sysclk_ps + 3000; memset(&dev_t, 0, sizeof(dev_t)); dev_t.mux = true; dev_t.sync_read = true; dev_t.sync_write = true; dev_t.clk = 11100; dev_t.t_bacc = 1000; dev_t.t_ces = 1000; dev_t.t_ceasu = 8 * 1000; dev_t.t_avdasu = t_scsnh_advnh - 7000; dev_t.t_ce_avd = 1000; dev_t.t_avdp_r = t_scsnh_advnh; dev_t.cyc_aavdh_oe = 3; dev_t.cyc_oe = 5; dev_t.t_ce_rdyz = 7000; dev_t.t_avdp_w = t_scsnh_advnh; dev_t.cyc_aavdh_we = 3; dev_t.cyc_wpl = 6; dev_t.t_ce_rdyz = 7000; gpmc_calc_timings(&t, &dev_t); return gpmc_cs_set_timings(sync_cs, &t); } /* tusb driver calls this when it changes the chip's clocking */ int tusb6010_platform_retime(unsigned is_refclk) { static const char error[] = KERN_ERR "tusb6010 %s retime error %d\n"; unsigned sysclk_ps; int status; if (!refclk_psec) return -ENODEV; sysclk_ps = is_refclk ? refclk_psec : TUSB6010_OSCCLK_60; status = tusb_set_async_mode(sysclk_ps); if (status < 0) { printk(error, "async", status); goto done; } status = tusb_set_sync_mode(sysclk_ps); if (status < 0) printk(error, "sync", status); done: return status; } EXPORT_SYMBOL_GPL(tusb6010_platform_retime); static struct resource tusb_resources[] = { /* Order is significant! The start/end fields * are updated during setup.. */ { /* Asynchronous access */ .flags = IORESOURCE_MEM, }, { /* Synchronous access */ .flags = IORESOURCE_MEM, }, { /* IRQ */ .name = "mc", .flags = IORESOURCE_IRQ, }, }; static u64 tusb_dmamask = ~(u32)0; static struct platform_device tusb_device = { .name = "musb-tusb", .id = -1, .dev = { .dma_mask = &tusb_dmamask, .coherent_dma_mask = 0xffffffff, }, .num_resources = ARRAY_SIZE(tusb_resources), .resource = tusb_resources, }; /* this may be called only from board-*.c setup code */ int __init tusb6010_setup_interface(struct musb_hdrc_platform_data *data, unsigned ps_refclk, unsigned waitpin, unsigned async, unsigned sync, unsigned irq, unsigned dmachan) { int status; static char error[] __initdata = KERN_ERR "tusb6010 init error %d, %d\n"; /* ASYNC region, primarily for PIO */ status = gpmc_cs_request(async, SZ_16M, (unsigned long *) &tusb_resources[0].start); if (status < 0) { printk(error, 1, status); return status; } tusb_resources[0].end = tusb_resources[0].start + 0x9ff; async_cs = async; gpmc_cs_write_reg(async, GPMC_CS_CONFIG1, GPMC_CONFIG1_PAGE_LEN(2) | GPMC_CONFIG1_WAIT_READ_MON | GPMC_CONFIG1_WAIT_WRITE_MON | GPMC_CONFIG1_WAIT_PIN_SEL(waitpin) | GPMC_CONFIG1_READTYPE_ASYNC | GPMC_CONFIG1_WRITETYPE_ASYNC | GPMC_CONFIG1_DEVICESIZE_16 | GPMC_CONFIG1_DEVICETYPE_NOR | GPMC_CONFIG1_MUXADDDATA); /* SYNC region, primarily for DMA */ status = gpmc_cs_request(sync, SZ_16M, (unsigned long *) &tusb_resources[1].start); if (status < 0) { printk(error, 2, status); return status; } tusb_resources[1].end = tusb_resources[1].start + 0x9ff; sync_cs = sync; gpmc_cs_write_reg(sync, GPMC_CS_CONFIG1, GPMC_CONFIG1_READMULTIPLE_SUPP | GPMC_CONFIG1_READTYPE_SYNC | GPMC_CONFIG1_WRITEMULTIPLE_SUPP | GPMC_CONFIG1_WRITETYPE_SYNC | GPMC_CONFIG1_PAGE_LEN(2) | GPMC_CONFIG1_WAIT_READ_MON | GPMC_CONFIG1_WAIT_WRITE_MON | GPMC_CONFIG1_WAIT_PIN_SEL(waitpin) | GPMC_CONFIG1_DEVICESIZE_16 | GPMC_CONFIG1_DEVICETYPE_NOR | GPMC_CONFIG1_MUXADDDATA /* fclk divider gets set later */ ); /* IRQ */ status = gpio_request_one(irq, GPIOF_IN, "TUSB6010 irq"); if (status < 0) { printk(error, 3, status); return status; } tusb_resources[2].start = gpio_to_irq(irq); /* set up memory timings ... can speed them up later */ if (!ps_refclk) { printk(error, 4, status); return -ENODEV; } refclk_psec = ps_refclk; status = tusb6010_platform_retime(1); if (status < 0) { printk(error, 5, status); return status; } /* finish device setup ... */ if (!data) { printk(error, 6, status); return -ENODEV; } tusb_device.dev.platform_data = data; /* REVISIT let the driver know what DMA channels work */ if (!dmachan) tusb_device.dev.dma_mask = NULL; else { /* assume OMAP 2420 ES2.0 and later */ if (dmachan & (1 << 0)) omap_mux_init_signal("sys_ndmareq0", 0); if (dmachan & (1 << 1)) omap_mux_init_signal("sys_ndmareq1", 0); if (dmachan & (1 << 2)) omap_mux_init_signal("sys_ndmareq2", 0); if (dmachan & (1 << 3)) omap_mux_init_signal("sys_ndmareq3", 0); if (dmachan & (1 << 4)) omap_mux_init_signal("sys_ndmareq4", 0); if (dmachan & (1 << 5)) omap_mux_init_signal("sys_ndmareq5", 0); } /* so far so good ... register the device */ status = platform_device_register(&tusb_device); if (status < 0) { printk(error, 7, status); return status; } return 0; }