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linux/arch/arm/mach-mxs/mach-mxs.c
Shawn Guo 44ffb78fe0 ARM: mxs: use auxdata to pass flexcan_switch function hook 
There are some efforts going on to have flexcan_switch function
implemented in flexcan driver, so that this platform function hook
can be saved for device tree boot.  But due to the mx28evk board
design oddness that two flexcan transceivers share one switch gpio,
we have to come up a separate and generic gpio-switch driver to handle
all these gpio switch use cases.

Before that happens, we choose to use auxdata to pass flexcan_switch
function hook, so that the DT conversion is not blocked there.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
2012-08-17 12:35:23 +08:00

442 lines
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/*
* Copyright 2012 Freescale Semiconductor, Inc.
* Copyright 2012 Linaro Ltd.
*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/can/platform/flexcan.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/irqdomain.h>
#include <linux/micrel_phy.h>
#include <linux/mxsfb.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/phy.h>
#include <linux/pinctrl/consumer.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
#include <mach/common.h>
#include <mach/digctl.h>
#include <mach/mxs.h>
static struct fb_videomode mx23evk_video_modes[] = {
{
.name = "Samsung-LMS430HF02",
.refresh = 60,
.xres = 480,
.yres = 272,
.pixclock = 108096, /* picosecond (9.2 MHz) */
.left_margin = 15,
.right_margin = 8,
.upper_margin = 12,
.lower_margin = 4,
.hsync_len = 1,
.vsync_len = 1,
.sync = FB_SYNC_DATA_ENABLE_HIGH_ACT |
FB_SYNC_DOTCLK_FAILING_ACT,
},
};
static struct fb_videomode mx28evk_video_modes[] = {
{
.name = "Seiko-43WVF1G",
.refresh = 60,
.xres = 800,
.yres = 480,
.pixclock = 29851, /* picosecond (33.5 MHz) */
.left_margin = 89,
.right_margin = 164,
.upper_margin = 23,
.lower_margin = 10,
.hsync_len = 10,
.vsync_len = 10,
.sync = FB_SYNC_DATA_ENABLE_HIGH_ACT |
FB_SYNC_DOTCLK_FAILING_ACT,
},
};
static struct fb_videomode m28evk_video_modes[] = {
{
.name = "Ampire AM-800480R2TMQW-T01H",
.refresh = 60,
.xres = 800,
.yres = 480,
.pixclock = 30066, /* picosecond (33.26 MHz) */
.left_margin = 0,
.right_margin = 256,
.upper_margin = 0,
.lower_margin = 45,
.hsync_len = 1,
.vsync_len = 1,
.sync = FB_SYNC_DATA_ENABLE_HIGH_ACT,
},
};
static struct fb_videomode apx4devkit_video_modes[] = {
{
.name = "HannStar PJ70112A",
.refresh = 60,
.xres = 800,
.yres = 480,
.pixclock = 33333, /* picosecond (30.00 MHz) */
.left_margin = 88,
.right_margin = 40,
.upper_margin = 32,
.lower_margin = 13,
.hsync_len = 48,
.vsync_len = 3,
.sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT |
FB_SYNC_DATA_ENABLE_HIGH_ACT |
FB_SYNC_DOTCLK_FAILING_ACT,
},
};
static struct mxsfb_platform_data mxsfb_pdata __initdata;
/*
* MX28EVK_FLEXCAN_SWITCH is shared between both flexcan controllers
*/
#define MX28EVK_FLEXCAN_SWITCH MXS_GPIO_NR(2, 13)
static int flexcan0_en, flexcan1_en;
static void mx28evk_flexcan_switch(void)
{
if (flexcan0_en || flexcan1_en)
gpio_set_value(MX28EVK_FLEXCAN_SWITCH, 1);
else
gpio_set_value(MX28EVK_FLEXCAN_SWITCH, 0);
}
static void mx28evk_flexcan0_switch(int enable)
{
flexcan0_en = enable;
mx28evk_flexcan_switch();
}
static void mx28evk_flexcan1_switch(int enable)
{
flexcan1_en = enable;
mx28evk_flexcan_switch();
}
static struct flexcan_platform_data flexcan_pdata[2];
static struct of_dev_auxdata mxs_auxdata_lookup[] __initdata = {
OF_DEV_AUXDATA("fsl,imx23-lcdif", 0x80030000, NULL, &mxsfb_pdata),
OF_DEV_AUXDATA("fsl,imx28-lcdif", 0x80030000, NULL, &mxsfb_pdata),
OF_DEV_AUXDATA("fsl,imx28-flexcan", 0x80032000, NULL, &flexcan_pdata[0]),
OF_DEV_AUXDATA("fsl,imx28-flexcan", 0x80034000, NULL, &flexcan_pdata[1]),
{ /* sentinel */ }
};
static int __init mxs_icoll_add_irq_domain(struct device_node *np,
struct device_node *interrupt_parent)
{
irq_domain_add_legacy(np, 128, 0, 0, &irq_domain_simple_ops, NULL);
return 0;
}
static int __init mxs_gpio_add_irq_domain(struct device_node *np,
struct device_node *interrupt_parent)
{
static int gpio_irq_base = MXS_GPIO_IRQ_START;
irq_domain_add_legacy(np, 32, gpio_irq_base, 0, &irq_domain_simple_ops, NULL);
gpio_irq_base += 32;
return 0;
}
static const struct of_device_id mxs_irq_match[] __initconst = {
{ .compatible = "fsl,mxs-icoll", .data = mxs_icoll_add_irq_domain, },
{ .compatible = "fsl,mxs-gpio", .data = mxs_gpio_add_irq_domain, },
{ /* sentinel */ }
};
static void __init mxs_dt_init_irq(void)
{
icoll_init_irq();
of_irq_init(mxs_irq_match);
}
static void __init imx23_timer_init(void)
{
mx23_clocks_init();
}
static struct sys_timer imx23_timer = {
.init = imx23_timer_init,
};
static void __init imx28_timer_init(void)
{
mx28_clocks_init();
}
static struct sys_timer imx28_timer = {
.init = imx28_timer_init,
};
enum mac_oui {
OUI_FSL,
OUI_DENX,
};
static void __init update_fec_mac_prop(enum mac_oui oui)
{
struct device_node *np, *from = NULL;
struct property *newmac;
const u32 *ocotp = mxs_get_ocotp();
u8 *macaddr;
u32 val;
int i;
for (i = 0; i < 2; i++) {
np = of_find_compatible_node(from, NULL, "fsl,imx28-fec");
if (!np)
return;
from = np;
newmac = kzalloc(sizeof(*newmac) + 6, GFP_KERNEL);
if (!newmac)
return;
newmac->value = newmac + 1;
newmac->length = 6;
newmac->name = kstrdup("local-mac-address", GFP_KERNEL);
if (!newmac->name) {
kfree(newmac);
return;
}
/*
* OCOTP only stores the last 4 octets for each mac address,
* so hard-code OUI here.
*/
macaddr = newmac->value;
switch (oui) {
case OUI_FSL:
macaddr[0] = 0x00;
macaddr[1] = 0x04;
macaddr[2] = 0x9f;
break;
case OUI_DENX:
macaddr[0] = 0xc0;
macaddr[1] = 0xe5;
macaddr[2] = 0x4e;
break;
}
val = ocotp[i];
macaddr[3] = (val >> 16) & 0xff;
macaddr[4] = (val >> 8) & 0xff;
macaddr[5] = (val >> 0) & 0xff;
prom_update_property(np, newmac);
}
}
static void __init imx23_evk_init(void)
{
mxsfb_pdata.mode_list = mx23evk_video_modes;
mxsfb_pdata.mode_count = ARRAY_SIZE(mx23evk_video_modes);
mxsfb_pdata.default_bpp = 32;
mxsfb_pdata.ld_intf_width = STMLCDIF_24BIT;
}
static inline void enable_clk_enet_out(void)
{
struct clk *clk = clk_get_sys("enet_out", NULL);
if (!IS_ERR(clk))
clk_prepare_enable(clk);
}
static void __init imx28_evk_init(void)
{
enable_clk_enet_out();
update_fec_mac_prop(OUI_FSL);
mxsfb_pdata.mode_list = mx28evk_video_modes;
mxsfb_pdata.mode_count = ARRAY_SIZE(mx28evk_video_modes);
mxsfb_pdata.default_bpp = 32;
mxsfb_pdata.ld_intf_width = STMLCDIF_24BIT;
mxs_saif_clkmux_select(MXS_DIGCTL_SAIF_CLKMUX_EXTMSTR0);
}
static void __init imx28_evk_post_init(void)
{
if (!gpio_request_one(MX28EVK_FLEXCAN_SWITCH, GPIOF_DIR_OUT,
"flexcan-switch")) {
flexcan_pdata[0].transceiver_switch = mx28evk_flexcan0_switch;
flexcan_pdata[1].transceiver_switch = mx28evk_flexcan1_switch;
}
}
static void __init m28evk_init(void)
{
enable_clk_enet_out();
update_fec_mac_prop(OUI_DENX);
mxsfb_pdata.mode_list = m28evk_video_modes;
mxsfb_pdata.mode_count = ARRAY_SIZE(m28evk_video_modes);
mxsfb_pdata.default_bpp = 16;
mxsfb_pdata.ld_intf_width = STMLCDIF_18BIT;
}
static int apx4devkit_phy_fixup(struct phy_device *phy)
{
phy->dev_flags |= MICREL_PHY_50MHZ_CLK;
return 0;
}
static void __init apx4devkit_init(void)
{
enable_clk_enet_out();
if (IS_BUILTIN(CONFIG_PHYLIB))
phy_register_fixup_for_uid(PHY_ID_KS8051, MICREL_PHY_ID_MASK,
apx4devkit_phy_fixup);
mxsfb_pdata.mode_list = apx4devkit_video_modes;
mxsfb_pdata.mode_count = ARRAY_SIZE(apx4devkit_video_modes);
mxsfb_pdata.default_bpp = 32;
mxsfb_pdata.ld_intf_width = STMLCDIF_24BIT;
}
#define ENET0_MDC__GPIO_4_0 MXS_GPIO_NR(4, 0)
#define ENET0_MDIO__GPIO_4_1 MXS_GPIO_NR(4, 1)
#define ENET0_RX_EN__GPIO_4_2 MXS_GPIO_NR(4, 2)
#define ENET0_RXD0__GPIO_4_3 MXS_GPIO_NR(4, 3)
#define ENET0_RXD1__GPIO_4_4 MXS_GPIO_NR(4, 4)
#define ENET0_TX_EN__GPIO_4_6 MXS_GPIO_NR(4, 6)
#define ENET0_TXD0__GPIO_4_7 MXS_GPIO_NR(4, 7)
#define ENET0_TXD1__GPIO_4_8 MXS_GPIO_NR(4, 8)
#define ENET_CLK__GPIO_4_16 MXS_GPIO_NR(4, 16)
#define TX28_FEC_PHY_POWER MXS_GPIO_NR(3, 29)
#define TX28_FEC_PHY_RESET MXS_GPIO_NR(4, 13)
#define TX28_FEC_nINT MXS_GPIO_NR(4, 5)
static const struct gpio tx28_gpios[] __initconst = {
{ ENET0_MDC__GPIO_4_0, GPIOF_OUT_INIT_LOW, "GPIO_4_0" },
{ ENET0_MDIO__GPIO_4_1, GPIOF_OUT_INIT_LOW, "GPIO_4_1" },
{ ENET0_RX_EN__GPIO_4_2, GPIOF_OUT_INIT_LOW, "GPIO_4_2" },
{ ENET0_RXD0__GPIO_4_3, GPIOF_OUT_INIT_LOW, "GPIO_4_3" },
{ ENET0_RXD1__GPIO_4_4, GPIOF_OUT_INIT_LOW, "GPIO_4_4" },
{ ENET0_TX_EN__GPIO_4_6, GPIOF_OUT_INIT_LOW, "GPIO_4_6" },
{ ENET0_TXD0__GPIO_4_7, GPIOF_OUT_INIT_LOW, "GPIO_4_7" },
{ ENET0_TXD1__GPIO_4_8, GPIOF_OUT_INIT_LOW, "GPIO_4_8" },
{ ENET_CLK__GPIO_4_16, GPIOF_OUT_INIT_LOW, "GPIO_4_16" },
{ TX28_FEC_PHY_POWER, GPIOF_OUT_INIT_LOW, "fec-phy-power" },
{ TX28_FEC_PHY_RESET, GPIOF_OUT_INIT_LOW, "fec-phy-reset" },
{ TX28_FEC_nINT, GPIOF_DIR_IN, "fec-int" },
};
static void __init tx28_post_init(void)
{
struct device_node *np;
struct platform_device *pdev;
struct pinctrl *pctl;
int ret;
enable_clk_enet_out();
np = of_find_compatible_node(NULL, NULL, "fsl,imx28-fec");
pdev = of_find_device_by_node(np);
if (!pdev) {
pr_err("%s: failed to find fec device\n", __func__);
return;
}
pctl = pinctrl_get_select(&pdev->dev, "gpio_mode");
if (IS_ERR(pctl)) {
pr_err("%s: failed to get pinctrl state\n", __func__);
return;
}
ret = gpio_request_array(tx28_gpios, ARRAY_SIZE(tx28_gpios));
if (ret) {
pr_err("%s: failed to request gpios: %d\n", __func__, ret);
return;
}
/* Power up fec phy */
gpio_set_value(TX28_FEC_PHY_POWER, 1);
msleep(26); /* 25ms according to data sheet */
/* Mode strap pins */
gpio_set_value(ENET0_RX_EN__GPIO_4_2, 1);
gpio_set_value(ENET0_RXD0__GPIO_4_3, 1);
gpio_set_value(ENET0_RXD1__GPIO_4_4, 1);
udelay(100); /* minimum assertion time for nRST */
/* Deasserting FEC PHY RESET */
gpio_set_value(TX28_FEC_PHY_RESET, 1);
pinctrl_put(pctl);
}
static void __init mxs_machine_init(void)
{
if (of_machine_is_compatible("fsl,imx28-evk"))
imx28_evk_init();
else if (of_machine_is_compatible("fsl,imx23-evk"))
imx23_evk_init();
else if (of_machine_is_compatible("denx,m28evk"))
m28evk_init();
else if (of_machine_is_compatible("bluegiga,apx4devkit"))
apx4devkit_init();
of_platform_populate(NULL, of_default_bus_match_table,
mxs_auxdata_lookup, NULL);
if (of_machine_is_compatible("karo,tx28"))
tx28_post_init();
if (of_machine_is_compatible("fsl,imx28-evk"))
imx28_evk_post_init();
}
static const char *imx23_dt_compat[] __initdata = {
"fsl,imx23",
NULL,
};
static const char *imx28_dt_compat[] __initdata = {
"fsl,imx28",
NULL,
};
DT_MACHINE_START(IMX23, "Freescale i.MX23 (Device Tree)")
.map_io = mx23_map_io,
.init_irq = mxs_dt_init_irq,
.timer = &imx23_timer,
.init_machine = mxs_machine_init,
.dt_compat = imx23_dt_compat,
.restart = mxs_restart,
MACHINE_END
DT_MACHINE_START(IMX28, "Freescale i.MX28 (Device Tree)")
.map_io = mx28_map_io,
.init_irq = mxs_dt_init_irq,
.timer = &imx28_timer,
.init_machine = mxs_machine_init,
.dt_compat = imx28_dt_compat,
.restart = mxs_restart,
MACHINE_END
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