ARM: OMAP2+: tusb6010: generic timing calculation

Generic gpmc timing calculation helper is available now, use
it instead of custom timing calculation.

Signed-off-by: Afzal Mohammed <afzal@ti.com>

1 files changed, 44 insertions, 138 deletions

diff --git a/arch/arm/mach-omap2/usb-tusb6010.c b/arch/arm/mach-omap2/usb-tusb6010.c
index 5be96c6..c5a3c6f 100644
--- a/arch/arm/mach-omap2/usb-tusb6010.c
+++ b/arch/arm/mach-omap2/usb-tusb6010.c
@@ -27,182 +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;
+	memset(&dev_t, 0, sizeof(dev_t));
 
-	/* 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);
+	dev_t.mux = true;
 
-	/* 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.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;
 
-	t.cs_wr_off = t.we_off;
-
-	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);
-
-	t.clk_activation = gpmc_ticks_to_ns(1);
+	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: