diff options
Diffstat (limited to 'drivers/video/mxs/lcdif.c')
| -rw-r--r-- | drivers/video/mxs/lcdif.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/drivers/video/mxs/lcdif.c b/drivers/video/mxs/lcdif.c new file mode 100644 index 000000000000..f7d48a6fb3e9 --- /dev/null +++ b/drivers/video/mxs/lcdif.c @@ -0,0 +1,136 @@ +/* + * Freescale MXS LCDIF low-level routines + * + * Author: Vitaly Wool <vital@embeddedalley.com> + * + * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved. + * Copyright (C) 2009-2010 Freescale Semiconductor, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include <linux/delay.h> +#include <linux/dma-mapping.h> + +#include <mach/hardware.h> +#include <mach/lcdif.h> +#include <mach/regs-lcdif.h> +#include <mach/system.h> + +#define REGS_LCDIF_BASE IO_ADDRESS(LCDIF_PHYS_ADDR) + +void mxs_init_lcdif(void) +{ + __raw_writel(BM_LCDIF_CTRL_CLKGATE, + REGS_LCDIF_BASE + HW_LCDIF_CTRL_CLR); + /* Reset controller */ + __raw_writel(BM_LCDIF_CTRL_SFTRST, REGS_LCDIF_BASE + HW_LCDIF_CTRL_SET); + udelay(10); + + /* Take controller out of reset */ + __raw_writel(BM_LCDIF_CTRL_SFTRST | BM_LCDIF_CTRL_CLKGATE, + REGS_LCDIF_BASE + HW_LCDIF_CTRL_CLR); + + /* Setup the bus protocol */ + __raw_writel(BM_LCDIF_CTRL1_MODE86, + REGS_LCDIF_BASE + HW_LCDIF_CTRL1_CLR); + __raw_writel(BM_LCDIF_CTRL1_BUSY_ENABLE, + REGS_LCDIF_BASE + HW_LCDIF_CTRL1_CLR); + + /* Take display out of reset */ + __raw_writel(BM_LCDIF_CTRL1_RESET, + REGS_LCDIF_BASE + HW_LCDIF_CTRL1_SET); + + /* VSYNC is an input by default */ + __raw_writel(BM_LCDIF_VDCTRL0_VSYNC_OEB, + REGS_LCDIF_BASE + HW_LCDIF_VDCTRL0_SET); + + /* Reset display */ + __raw_writel(BM_LCDIF_CTRL1_RESET, + REGS_LCDIF_BASE + HW_LCDIF_CTRL1_CLR); + udelay(10); + __raw_writel(BM_LCDIF_CTRL1_RESET, + REGS_LCDIF_BASE + HW_LCDIF_CTRL1_SET); + udelay(10); +} +EXPORT_SYMBOL(mxs_init_lcdif); + +int mxs_lcdif_dma_init(struct device *dev, dma_addr_t phys, int memsize) +{ + __raw_writel(BM_LCDIF_CTRL_LCDIF_MASTER, + REGS_LCDIF_BASE + HW_LCDIF_CTRL_SET); + + __raw_writel(phys, REGS_LCDIF_BASE + HW_LCDIF_CUR_BUF); + __raw_writel(phys, REGS_LCDIF_BASE + HW_LCDIF_NEXT_BUF); + + return 0; +} +EXPORT_SYMBOL(mxs_lcdif_dma_init); + +void mxs_lcdif_dma_release(void) +{ + __raw_writel(BM_LCDIF_CTRL_LCDIF_MASTER, + REGS_LCDIF_BASE + HW_LCDIF_CTRL_CLR); + return; +} +EXPORT_SYMBOL(mxs_lcdif_dma_release); + +void mxs_lcdif_run(void) +{ + __raw_writel(BM_LCDIF_CTRL_LCDIF_MASTER, + REGS_LCDIF_BASE + HW_LCDIF_CTRL_SET); + __raw_writel(BM_LCDIF_CTRL_RUN, REGS_LCDIF_BASE + HW_LCDIF_CTRL_SET); +} +EXPORT_SYMBOL(mxs_lcdif_run); + +void mxs_lcdif_stop(void) +{ + __raw_writel(BM_LCDIF_CTRL_RUN, REGS_LCDIF_BASE + HW_LCDIF_CTRL_CLR); + __raw_writel(BM_LCDIF_CTRL_LCDIF_MASTER, + REGS_LCDIF_BASE + HW_LCDIF_CTRL_CLR); + udelay(100); +} +EXPORT_SYMBOL(mxs_lcdif_stop); + +int mxs_lcdif_pan_display(dma_addr_t addr) +{ + __raw_writel(addr, REGS_LCDIF_BASE + HW_LCDIF_NEXT_BUF); + + return 0; +} + +EXPORT_SYMBOL(mxs_lcdif_pan_display); + +static BLOCKING_NOTIFIER_HEAD(lcdif_client_list); + +int mxs_lcdif_register_client(struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&lcdif_client_list, nb); +} + +EXPORT_SYMBOL(mxs_lcdif_register_client); + +void mxs_lcdif_unregister_client(struct notifier_block *nb) +{ + blocking_notifier_chain_unregister(&lcdif_client_list, nb); +} +EXPORT_SYMBOL(mxs_lcdif_unregister_client); + +void mxs_lcdif_notify_clients(unsigned long event, + struct mxs_platform_fb_entry *pentry) +{ + blocking_notifier_call_chain(&lcdif_client_list, event, pentry); +} +EXPORT_SYMBOL(mxs_lcdif_notify_clients); |