diff options
Diffstat (limited to 'arch/arm/mach-omap2/usb-tusb6010.c')
| -rw-r--r-- | arch/arm/mach-omap2/usb-tusb6010.c | 184 |
1 files changed, 46 insertions, 138 deletions
diff --git a/arch/arm/mach-omap2/usb-tusb6010.c b/arch/arm/mach-omap2/usb-tusb6010.c index 805bea6edf17..c5a3c6f9504e 100644 --- a/arch/arm/mach-omap2/usb-tusb6010.c +++ b/arch/arm/mach-omap2/usb-tusb6010.c @@ -15,10 +15,11 @@ #include <linux/platform_device.h> #include <linux/gpio.h> #include <linux/export.h> +#include <linux/platform_data/usb-omap.h> #include <linux/usb/musb.h> -#include <plat/gpmc.h> +#include "gpmc.h" #include "mux.h" @@ -26,180 +27,88 @@ static u8 async_cs, sync_cs; static unsigned refclk_psec; -/* t2_ps, when quantized to fclk units, must happen no earlier than - * the clock after after t1_NS. - * - * Return a possibly updated value of t2_ps, converted to nsec. - */ -static unsigned -next_clk(unsigned t1_NS, unsigned t2_ps, unsigned fclk_ps) -{ - unsigned t1_ps = t1_NS * 1000; - unsigned t1_f, t2_f; - - if ((t1_ps + fclk_ps) < t2_ps) - return t2_ps / 1000; - - t1_f = (t1_ps + fclk_ps - 1) / fclk_ps; - t2_f = (t2_ps + fclk_ps - 1) / fclk_ps; - - if (t1_f >= t2_f) - t2_f = t1_f + 1; - - return (t2_f * fclk_ps) / 1000; -} - /* NOTE: timings are from tusb 6010 datasheet Rev 1.8, 12-Sept 2006 */ -static int tusb_set_async_mode(unsigned sysclk_ps, unsigned fclk_ps) +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; - unsigned tmp; - - memset(&t, 0, sizeof(t)); - - /* CS_ON = t_acsnh_acsnl */ - t.cs_on = 8; - /* ADV_ON = t_acsnh_advnh - t_advn */ - t.adv_on = next_clk(t.cs_on, t_acsnh_advnh - 7000, fclk_ps); - - /* - * READ ... from omap2420 TRM fig 12-13 - */ - - /* ADV_RD_OFF = t_acsnh_advnh */ - t.adv_rd_off = next_clk(t.adv_on, t_acsnh_advnh, fclk_ps); - - /* OE_ON = t_acsnh_advnh + t_advn_oen (then wait for nRDY) */ - t.oe_on = next_clk(t.adv_on, t_acsnh_advnh + 1000, fclk_ps); - - /* ACCESS = counters continue only after nRDY */ - tmp = t.oe_on * 1000 + 300; - t.access = next_clk(t.oe_on, tmp, fclk_ps); - - /* OE_OFF = after data gets sampled */ - tmp = t.access * 1000; - t.oe_off = next_clk(t.access, tmp, fclk_ps); - - t.cs_rd_off = t.oe_off; - - tmp = t.cs_rd_off * 1000 + 7000 /* t_acsn_rdy_z */; - t.rd_cycle = next_clk(t.cs_rd_off, tmp, fclk_ps); - - /* - * WRITE ... from omap2420 TRM fig 12-15 - */ - - /* ADV_WR_OFF = t_acsnh_advnh */ - t.adv_wr_off = t.adv_rd_off; - /* WE_ON = t_acsnh_advnh + t_advn_wen (then wait for nRDY) */ - t.we_on = next_clk(t.adv_wr_off, t_acsnh_advnh + 1000, fclk_ps); + memset(&dev_t, 0, sizeof(dev_t)); - /* WE_OFF = after data gets sampled */ - tmp = t.we_on * 1000 + 300; - t.we_off = next_clk(t.we_on, tmp, fclk_ps); + dev_t.mux = true; - t.cs_wr_off = t.we_off; + 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; - tmp = t.cs_wr_off * 1000 + 7000 /* t_acsn_rdy_z */; - t.wr_cycle = next_clk(t.cs_wr_off, tmp, fclk_ps); + gpmc_calc_timings(&t, &dev_t); return gpmc_cs_set_timings(async_cs, &t); } -static int tusb_set_sync_mode(unsigned sysclk_ps, unsigned fclk_ps) +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; - unsigned tmp; - - memset(&t, 0, sizeof(t)); - t.cs_on = 8; - - /* ADV_ON = t_acsnh_advnh - t_advn */ - t.adv_on = next_clk(t.cs_on, t_scsnh_advnh - 7000, fclk_ps); - - /* GPMC_CLK rate = fclk rate / div */ - t.sync_clk = 11100 /* 11.1 nsec */; - tmp = (t.sync_clk + fclk_ps - 1) / fclk_ps; - if (tmp > 4) - return -ERANGE; - if (tmp == 0) - tmp = 1; - t.page_burst_access = (fclk_ps * tmp) / 1000; - - /* - * READ ... based on omap2420 TRM fig 12-19, 12-20 - */ - - /* ADV_RD_OFF = t_scsnh_advnh */ - t.adv_rd_off = next_clk(t.adv_on, t_scsnh_advnh, fclk_ps); - - /* OE_ON = t_scsnh_advnh + t_advn_oen * fclk_ps (then wait for nRDY) */ - tmp = (t.adv_rd_off * 1000) + (3 * fclk_ps); - t.oe_on = next_clk(t.adv_on, tmp, fclk_ps); - - /* ACCESS = number of clock cycles after t_adv_eon */ - tmp = (t.oe_on * 1000) + (5 * fclk_ps); - t.access = next_clk(t.oe_on, tmp, fclk_ps); - /* OE_OFF = after data gets sampled */ - tmp = (t.access * 1000) + (1 * fclk_ps); - t.oe_off = next_clk(t.access, tmp, fclk_ps); - - t.cs_rd_off = t.oe_off; - - tmp = t.cs_rd_off * 1000 + 7000 /* t_scsn_rdy_z */; - t.rd_cycle = next_clk(t.cs_rd_off, tmp, fclk_ps); - - /* - * WRITE ... based on omap2420 TRM fig 12-21 - */ - - /* ADV_WR_OFF = t_scsnh_advnh */ - t.adv_wr_off = t.adv_rd_off; - - /* WE_ON = t_scsnh_advnh + t_advn_wen * fclk_ps (then wait for nRDY) */ - tmp = (t.adv_wr_off * 1000) + (3 * fclk_ps); - t.we_on = next_clk(t.adv_wr_off, tmp, fclk_ps); - - /* WE_OFF = number of clock cycles after t_adv_wen */ - tmp = (t.we_on * 1000) + (6 * fclk_ps); - t.we_off = next_clk(t.we_on, tmp, fclk_ps); - - t.cs_wr_off = t.we_off; - - tmp = t.cs_wr_off * 1000 + 7000 /* t_scsn_rdy_z */; - t.wr_cycle = next_clk(t.cs_wr_off, tmp, fclk_ps); + 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); } -extern unsigned long gpmc_get_fclk_period(void); - /* 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 fclk_ps = gpmc_get_fclk_period(); unsigned sysclk_ps; int status; - if (!refclk_psec || fclk_ps == 0) + if (!refclk_psec) return -ENODEV; sysclk_ps = is_refclk ? refclk_psec : TUSB6010_OSCCLK_60; - status = tusb_set_async_mode(sysclk_ps, fclk_ps); + status = tusb_set_async_mode(sysclk_ps); if (status < 0) { printk(error, "async", status); goto done; } - status = tusb_set_sync_mode(sysclk_ps, fclk_ps); + status = tusb_set_sync_mode(sysclk_ps); if (status < 0) printk(error, "sync", status); done: @@ -283,7 +192,6 @@ tusb6010_setup_interface(struct musb_hdrc_platform_data *data, | GPMC_CONFIG1_READTYPE_SYNC | GPMC_CONFIG1_WRITEMULTIPLE_SUPP | GPMC_CONFIG1_WRITETYPE_SYNC - | GPMC_CONFIG1_CLKACTIVATIONTIME(1) | GPMC_CONFIG1_PAGE_LEN(2) | GPMC_CONFIG1_WAIT_READ_MON | GPMC_CONFIG1_WAIT_WRITE_MON |
