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/*
* OMAP2plus display device setup / initialization.
*
* Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
* Senthilvadivu Guruswamy
* Sumit Semwal
*
* 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.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <video/omapdss.h>
#include <plat/omap_hwmod.h>
#include <plat/omap_device.h>
#include <plat/omap-pm.h>
#include <plat/common.h>
#include "control.h"
static struct platform_device omap_display_device = {
.name = "omapdss",
.id = -1,
.dev = {
.platform_data = NULL,
},
};
struct omap_dss_hwmod_data {
const char *oh_name;
const char *dev_name;
const int id;
};
static const struct omap_dss_hwmod_data omap2_dss_hwmod_data[] __initdata = {
{ "dss_core", "omapdss_dss", -1 },
{ "dss_dispc", "omapdss_dispc", -1 },
{ "dss_rfbi", "omapdss_rfbi", -1 },
{ "dss_venc", "omapdss_venc", -1 },
};
static const struct omap_dss_hwmod_data omap3_dss_hwmod_data[] __initdata = {
{ "dss_core", "omapdss_dss", -1 },
{ "dss_dispc", "omapdss_dispc", -1 },
{ "dss_rfbi", "omapdss_rfbi", -1 },
{ "dss_venc", "omapdss_venc", -1 },
{ "dss_dsi1", "omapdss_dsi", 0 },
};
static const struct omap_dss_hwmod_data omap4_dss_hwmod_data[] __initdata = {
{ "dss_core", "omapdss_dss", -1 },
{ "dss_dispc", "omapdss_dispc", -1 },
{ "dss_rfbi", "omapdss_rfbi", -1 },
{ "dss_venc", "omapdss_venc", -1 },
{ "dss_dsi1", "omapdss_dsi", 0 },
{ "dss_dsi2", "omapdss_dsi", 1 },
{ "dss_hdmi", "omapdss_hdmi", -1 },
};
static int omap4_dsi_mux_pads(int dsi_id, unsigned lanes)
{
u32 enable_mask, enable_shift;
u32 pipd_mask, pipd_shift;
u32 reg;
if (dsi_id == 0) {
enable_mask = OMAP4_DSI1_LANEENABLE_MASK;
enable_shift = OMAP4_DSI1_LANEENABLE_SHIFT;
pipd_mask = OMAP4_DSI1_PIPD_MASK;
pipd_shift = OMAP4_DSI1_PIPD_SHIFT;
} else if (dsi_id == 1) {
enable_mask = OMAP4_DSI2_LANEENABLE_MASK;
enable_shift = OMAP4_DSI2_LANEENABLE_SHIFT;
pipd_mask = OMAP4_DSI2_PIPD_MASK;
pipd_shift = OMAP4_DSI2_PIPD_SHIFT;
} else {
return -ENODEV;
}
reg = omap4_ctrl_pad_readl(OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_DSIPHY);
reg &= ~enable_mask;
reg &= ~pipd_mask;
reg |= (lanes << enable_shift) & enable_mask;
reg |= (lanes << pipd_shift) & pipd_mask;
omap4_ctrl_pad_writel(reg, OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_DSIPHY);
return 0;
}
static int omap_dsi_enable_pads(int dsi_id, unsigned lane_mask)
{
if (cpu_is_omap44xx())
return omap4_dsi_mux_pads(dsi_id, lane_mask);
return 0;
}
static void omap_dsi_disable_pads(int dsi_id, unsigned lane_mask)
{
if (cpu_is_omap44xx())
omap4_dsi_mux_pads(dsi_id, 0);
}
int __init omap_display_init(struct omap_dss_board_info *board_data)
{
int r = 0;
struct omap_hwmod *oh;
struct platform_device *pdev;
int i, oh_count;
struct omap_display_platform_data pdata;
const struct omap_dss_hwmod_data *curr_dss_hwmod;
memset(&pdata, 0, sizeof(pdata));
if (cpu_is_omap24xx()) {
curr_dss_hwmod = omap2_dss_hwmod_data;
oh_count = ARRAY_SIZE(omap2_dss_hwmod_data);
} else if (cpu_is_omap34xx()) {
curr_dss_hwmod = omap3_dss_hwmod_data;
oh_count = ARRAY_SIZE(omap3_dss_hwmod_data);
} else {
curr_dss_hwmod = omap4_dss_hwmod_data;
oh_count = ARRAY_SIZE(omap4_dss_hwmod_data);
}
if (board_data->dsi_enable_pads == NULL)
board_data->dsi_enable_pads = omap_dsi_enable_pads;
if (board_data->dsi_disable_pads == NULL)
board_data->dsi_disable_pads = omap_dsi_disable_pads;
pdata.board_data = board_data;
pdata.board_data->get_context_loss_count =
omap_pm_get_dev_context_loss_count;
for (i = 0; i < oh_count; i++) {
oh = omap_hwmod_lookup(curr_dss_hwmod[i].oh_name);
if (!oh) {
pr_err("Could not look up %s\n",
curr_dss_hwmod[i].oh_name);
return -ENODEV;
}
pdev = omap_device_build(curr_dss_hwmod[i].dev_name,
curr_dss_hwmod[i].id, oh, &pdata,
sizeof(struct omap_display_platform_data),
NULL, 0, 0);
if (WARN((IS_ERR(pdev)), "Could not build omap_device for %s\n",
curr_dss_hwmod[i].oh_name))
return -ENODEV;
}
omap_display_device.dev.platform_data = board_data;
r = platform_device_register(&omap_display_device);
if (r < 0)
printk(KERN_ERR "Unable to register OMAP-Display device\n");
return r;
}
#define MAX_MODULE_SOFTRESET_WAIT 10000
int omap_dss_reset(struct omap_hwmod *oh)
{
struct omap_hwmod_opt_clk *oc;
int c = 0;
int i, r;
if (!(oh->class->sysc->sysc_flags & SYSS_HAS_RESET_STATUS)) {
pr_err("dss_core: hwmod data doesn't contain reset data\n");
return -EINVAL;
}
for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
if (oc->_clk)
clk_enable(oc->_clk);
omap_test_timeout((omap_hwmod_read(oh, oh->class->sysc->syss_offs)
& SYSS_RESETDONE_MASK),
MAX_MODULE_SOFTRESET_WAIT, c);
if (c == MAX_MODULE_SOFTRESET_WAIT)
pr_warning("dss_core: waiting for reset to finish failed\n");
else
pr_debug("dss_core: softreset done\n");
for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++)
if (oc->_clk)
clk_disable(oc->_clk);
r = (c == MAX_MODULE_SOFTRESET_WAIT) ? -ETIMEDOUT : 0;
return r;
}
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