Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c1ed6407cddbd87206b860f6207731d51c1d57bf
Commit:     c1ed6407cddbd87206b860f6207731d51c1d57bf
Parent:     7d34f3b3901cf31611183f158b949d8a823a9762
Author:     David Brownell <[EMAIL PROTECTED]>
AuthorDate: Thu Dec 7 14:03:49 2006 -0800
Committer:  Tony Lindgren <[EMAIL PROTECTED]>
CommitDate: Thu Sep 20 09:59:21 2007 -0700

    ARM: OMAP: TUSB EVM init
    
    Add init support for the TUSB6010 EVM board, as connected to H4.
    
    Signed-off-by: David Brownell <[EMAIL PROTECTED]>
    Signed-off-by: Tony Lindgren <[EMAIL PROTECTED]>
---
 arch/arm/mach-omap2/usb-tusb6010.c |  349 ++++++++++++++++++++++++++++++++++++
 1 files changed, 349 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/usb-tusb6010.c 
b/arch/arm/mach-omap2/usb-tusb6010.c
new file mode 100644
index 0000000..80bb42e
--- /dev/null
+++ b/arch/arm/mach-omap2/usb-tusb6010.c
@@ -0,0 +1,349 @@
+/*
+ * 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 <linux/types.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+
+#include <linux/usb/musb.h>
+
+#include <asm/arch/gpmc.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/mux.h>
+
+
+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)
+{
+       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);
+
+       /* WE_OFF = after data gets sampled */
+       tmp = t.we_on * 1000 + 300;
+       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_acsn_rdy_z */;
+       t.wr_cycle = next_clk(t.cs_wr_off, tmp, fclk_ps);
+
+       return gpmc_cs_set_timings(async_cs, &t);
+}
+
+static int tusb_set_sync_mode(unsigned sysclk_ps, unsigned fclk_ps)
+{
+       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 = 12 /* 11.1 nsec */;
+       tmp = (t.sync_clk * 1000 + 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);
+
+       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)
+               return -ENODEV;
+
+       sysclk_ps = is_refclk ? refclk_psec : TUSB6010_OSCCLK_60;
+
+       status = tusb_set_async_mode(sysclk_ps, fclk_ps);
+       if (status < 0) {
+               printk(error, "async", status);
+               goto done;
+       }
+       status = tusb_set_sync_mode(sysclk_ps, fclk_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 */
+               .flags  = IORESOURCE_IRQ,
+       },
+};
+
+static u64 tusb_dmamask = ~(u32)0;
+
+static struct platform_device tusb_device = {
+       .name           = "musb_hdrc",
+       .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_CLKACTIVATIONTIME(1)
+                       | 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 = omap_request_gpio(irq);
+       if (status < 0) {
+               printk(error, 3, status);
+               return status;
+       }
+       omap_set_gpio_direction(irq, 1);
+       tusb_resources[2].start = irq + IH_GPIO_BASE;
+
+       /* 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;
+       }
+       data->multipoint = 1;
+       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_cfg_reg(AA10_242X_DMAREQ0);
+               if (dmachan & (1 << 1))
+                       omap_cfg_reg(AA6_242X_DMAREQ1);
+               if (dmachan & (1 << 2))
+                       omap_cfg_reg(E4_242X_DMAREQ2);
+               if (dmachan & (1 << 3))
+                       omap_cfg_reg(G4_242X_DMAREQ3);
+               if (dmachan & (1 << 4))
+                       omap_cfg_reg(D3_242X_DMAREQ4);
+               if (dmachan & (1 << 5))
+                       omap_cfg_reg(E3_242X_DMAREQ5);
+       }
+
+       /* so far so good ... register the device */
+       status = platform_device_register(&tusb_device);
+       if (status < 0) {
+               printk(error, 7, status);
+               return status;
+       }
+       return 0;
+}
-
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Reply via email to