--- /dev/null
+/*
+ * drivers/video/pnx4008/sdum.c
+ *
+ * Display Update Master support
+ *
+ * Authors: Grigory Tolstolytkin <gtolstolytkin@ru.mvista.com>
+ * Vitaly Wool <vitalywool@gmail.com>
+ * Based on Philips Semiconductors's code
+ *
+ * Copyrght (c) 2005-2006 MontaVista Software, Inc.
+ * Copyright (c) 2005 Philips Semiconductors
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/fb.h>
+#include <linux/init.h>
+#include <linux/dma-mapping.h>
+#include <linux/clk.h>
+#include <asm/uaccess.h>
+#include <asm/arch/gpio.h>
+
+#include "sdum.h"
+#include "fbcommon.h"
+#include "dum.h"
+
+/* Framebuffers we have */
+
+static struct pnx4008_fb_addr {
+ int fb_type;
+ long addr_offset;
+ long fb_length;
+} fb_addr[] = {
+ [0] = {
+ FB_TYPE_YUV, 0, 0xB0000
+ },
+ [1] = {
+ FB_TYPE_RGB, 0xB0000, 0x50000
+ },
+};
+
+static struct dum_data {
+ u32 lcd_phys_start;
+ u32 lcd_virt_start;
+ u32 slave_phys_base;
+ u32 *slave_virt_base;
+ int fb_owning_channel[MAX_DUM_CHANNELS];
+ struct dumchannel_uf chan_uf_store[MAX_DUM_CHANNELS];
+} dum_data;
+
+/* Different local helper functions */
+
+static u32 nof_pixels_dx(struct dum_ch_setup *ch_setup)
+{
+ return (ch_setup->xmax - ch_setup->xmin + 1);
+}
+
+static u32 nof_pixels_dy(struct dum_ch_setup *ch_setup)
+{
+ return (ch_setup->ymax - ch_setup->ymin + 1);
+}
+
+static u32 nof_pixels_dxy(struct dum_ch_setup *ch_setup)
+{
+ return (nof_pixels_dx(ch_setup) * nof_pixels_dy(ch_setup));
+}
+
+static u32 nof_bytes(struct dum_ch_setup *ch_setup)
+{
+ u32 r = nof_pixels_dxy(ch_setup);
+ switch (ch_setup->format) {
+ case RGB888:
+ case RGB666:
+ r *= 4;
+ break;
+
+ default:
+ r *= 2;
+ break;
+ }
+ return r;
+}
+
+static u32 build_command(int disp_no, u32 reg, u32 val)
+{
+ return ((disp_no << 26) | BIT(25) | (val << 16) | (disp_no << 10) |
+ (reg << 0));
+}
+
+static u32 build_double_index(int disp_no, u32 val)
+{
+ return ((disp_no << 26) | (val << 16) | (disp_no << 10) | (val << 0));
+}
+
+static void build_disp_window(struct dum_ch_setup * ch_setup, struct disp_window * dw)
+{
+ dw->ymin = ch_setup->ymin;
+ dw->ymax = ch_setup->ymax;
+ dw->xmin_l = ch_setup->xmin & 0xFF;
+ dw->xmin_h = (ch_setup->xmin & BIT(8)) >> 8;
+ dw->xmax_l = ch_setup->xmax & 0xFF;
+ dw->xmax_h = (ch_setup->xmax & BIT(8)) >> 8;
+}
+
+static int put_channel(struct dumchannel chan)
+{
+ int i = chan.channelnr;
+
+ if (i < 0 || i > MAX_DUM_CHANNELS)
+ return -EINVAL;
+ else {
+ DUM_CH_MIN(i) = chan.dum_ch_min;
+ DUM_CH_MAX(i) = chan.dum_ch_max;
+ DUM_CH_CONF(i) = chan.dum_ch_conf;
+ DUM_CH_CTRL(i) = chan.dum_ch_ctrl;
+ }
+
+ return 0;
+}
+
+static void clear_channel(int channr)
+{
+ struct dumchannel chan;
+
+ chan.channelnr = channr;
+ chan.dum_ch_min = 0;
+ chan.dum_ch_max = 0;
+ chan.dum_ch_conf = 0;
+ chan.dum_ch_ctrl = 0;
+
+ put_channel(chan);
+}
+
+static int put_cmd_string(struct cmdstring cmds)
+{
+ u16 *cmd_str_virtaddr;
+ u32 *cmd_ptr0_virtaddr;
+ u32 cmd_str_physaddr;
+
+ int i = cmds.channelnr;
+
+ if (i < 0 || i > MAX_DUM_CHANNELS)
+ return -EINVAL;
+ else if ((cmd_ptr0_virtaddr =
+ (int *)ioremap_nocache(DUM_COM_BASE,
+ sizeof(int) * MAX_DUM_CHANNELS)) ==
+ NULL)
+ return -EIOREMAPFAILED;
+ else {
+ cmd_str_physaddr = ioread32(&cmd_ptr0_virtaddr[cmds.channelnr]);
+ if ((cmd_str_virtaddr =
+ (u16 *) ioremap_nocache(cmd_str_physaddr,
+ sizeof(cmds))) == NULL) {
+ iounmap(cmd_ptr0_virtaddr);
+ return -EIOREMAPFAILED;
+ } else {
+ int t;
+ for (t = 0; t < 8; t++)
+ iowrite16(*((u16 *)&cmds.prestringlen + t),
+ cmd_str_virtaddr + t);
+
+ for (t = 0; t < cmds.prestringlen / 2; t++)
+ iowrite16(*((u16 *)&cmds.precmd + t),
+ cmd_str_virtaddr + t + 8);
+
+ for (t = 0; t < cmds.poststringlen / 2; t++)
+ iowrite16(*((u16 *)&cmds.postcmd + t),
+ cmd_str_virtaddr + t + 8 +
+ cmds.prestringlen / 2);
+
+ iounmap(cmd_ptr0_virtaddr);
+ iounmap(cmd_str_virtaddr);
+ }
+ }
+
+ return 0;
+}
+
+static u32 dum_ch_setup(int ch_no, struct dum_ch_setup * ch_setup)
+{
+ struct cmdstring cmds_c;
+ struct cmdstring *cmds = &cmds_c;
+ struct disp_window dw;
+ int standard;
+ u32 orientation = 0;
+ struct dumchannel chan = { 0 };
+ int ret;
+
+ if ((ch_setup->xmirror) || (ch_setup->ymirror) || (ch_setup->rotate)) {
+ standard = 0;
+
+ orientation = BIT(1); /* always set 9-bit-bus */
+ if (ch_setup->xmirror)
+ orientation |= BIT(4);
+ if (ch_setup->ymirror)
+ orientation |= BIT(3);
+ if (ch_setup->rotate)
+ orientation |= BIT(0);
+ } else
+ standard = 1;
+
+ cmds->channelnr = ch_no;
+
+ /* build command string header */
+ if (standard) {
+ cmds->prestringlen = 32;
+ cmds->poststringlen = 0;
+ } else {
+ cmds->prestringlen = 48;
+ cmds->poststringlen = 16;
+ }
+
+ cmds->format =
+ (u16) ((ch_setup->disp_no << 4) | (BIT(3)) | (ch_setup->format));
+ cmds->reserved = 0x0;
+ cmds->startaddr_low = (ch_setup->minadr & 0xFFFF);
+ cmds->startaddr_high = (ch_setup->minadr >> 16);
+
+ if ((ch_setup->minadr == 0) && (ch_setup->maxadr == 0)
+ && (ch_setup->xmin == 0)
+ && (ch_setup->ymin == 0) && (ch_setup->xmax == 0)
+ && (ch_setup->ymax == 0)) {
+ cmds->pixdatlen_low = 0;
+ cmds->pixdatlen_high = 0;
+ } else {
+ u32 nbytes = nof_bytes(ch_setup);
+ cmds->pixdatlen_low = (nbytes & 0xFFFF);
+ cmds->pixdatlen_high = (nbytes >> 16);
+ }
+
+ if (ch_setup->slave_trans)
+ cmds->pixdatlen_high |= BIT(15);
+
+ /* build pre-string */
+ build_disp_window(ch_setup, &dw);
+
+ if (standard) {
+ cmds->precmd[0] =
+ build_command(ch_setup->disp_no, DISP_XMIN_L_REG, 0x99);
+ cmds->precmd[1] =
+ build_command(ch_setup->disp_no, DISP_XMIN_L_REG,
+ dw.xmin_l);
+ cmds->precmd[2] =
+ build_command(ch_setup->disp_no, DISP_XMIN_H_REG,
+ dw.xmin_h);
+ cmds->precmd[3] =
+ build_command(ch_setup->disp_no, DISP_YMIN_REG, dw.ymin);
+ cmds->precmd[4] =
+ build_command(ch_setup->disp_no, DISP_XMAX_L_REG,
+ dw.xmax_l);
+ cmds->precmd[5] =
+ build_command(ch_setup->disp_no, DISP_XMAX_H_REG,
+ dw.xmax_h);
+ cmds->precmd[6] =
+ build_command(ch_setup->disp_no, DISP_YMAX_REG, dw.ymax);
+ cmds->precmd[7] =
+ build_double_index(ch_setup->disp_no, DISP_PIXEL_REG);
+ } else {
+ if (dw.xmin_l == ch_no)
+ cmds->precmd[0] =
+ build_command(ch_setup->disp_no, DISP_XMIN_L_REG,
+ 0x99);
+ else
+ cmds->precmd[0] =
+ build_command(ch_setup->disp_no, DISP_XMIN_L_REG,
+ ch_no);
+
+ cmds->precmd[1] =
+ build_command(ch_setup->disp_no, DISP_XMIN_L_REG,
+ dw.xmin_l);
+ cmds->precmd[2] =
+ build_command(ch_setup->disp_no, DISP_XMIN_H_REG,
+ dw.xmin_h);
+ cmds->precmd[3] =
+ build_command(ch_setup->disp_no, DISP_YMIN_REG, dw.ymin);
+ cmds->precmd[4] =
+ build_command(ch_setup->disp_no, DISP_XMAX_L_REG,
+ dw.xmax_l);
+ cmds->precmd[5] =
+ build_command(ch_setup->disp_no, DISP_XMAX_H_REG,
+ dw.xmax_h);
+ cmds->precmd[6] =
+ build_command(ch_setup->disp_no, DISP_YMAX_REG, dw.ymax);
+ cmds->precmd[7] =
+ build_command(ch_setup->disp_no, DISP_1_REG, orientation);
+ cmds->precmd[8] =
+ build_double_index(ch_setup->disp_no, DISP_PIXEL_REG);
+ cmds->precmd[9] =
+ build_double_index(ch_setup->disp_no, DISP_PIXEL_REG);
+ cmds->precmd[0xA] =
+ build_double_index(ch_setup->disp_no, DISP_PIXEL_REG);
+ cmds->precmd[0xB] =
+ build_double_index(ch_setup->disp_no, DISP_PIXEL_REG);
+ cmds->postcmd[0] =
+ build_command(ch_setup->disp_no, DISP_1_REG, BIT(1));
+ cmds->postcmd[1] =
+ build_command(ch_setup->disp_no, DISP_DUMMY1_REG, 1);
+ cmds->postcmd[2] =
+ build_command(ch_setup->disp_no, DISP_DUMMY1_REG, 2);
+ cmds->postcmd[3] =
+ build_command(ch_setup->disp_no, DISP_DUMMY1_REG, 3);
+ }
+
+ if ((ret = put_cmd_string(cmds_c)) != 0) {
+ return ret;
+ }
+
+ chan.channelnr = cmds->channelnr;
+ chan.dum_ch_min = ch_setup->dirtybuffer + ch_setup->minadr;
+ chan.dum_ch_max = ch_setup->dirtybuffer + ch_setup->maxadr;
+ chan.dum_ch_conf = 0x002;
+ chan.dum_ch_ctrl = 0x04;
+
+ put_channel(chan);
+
+ return 0;
+}
+
+static u32 display_open(int ch_no, int auto_update, u32 * dirty_buffer,
+ u32 * frame_buffer, u32 xpos, u32 ypos, u32 w, u32 h)
+{
+
+ struct dum_ch_setup k;
+ int ret;
+
+ /* keep width & height within display area */
+ if ((xpos + w) > DISP_MAX_X_SIZE)
+ w = DISP_MAX_X_SIZE - xpos;
+
+ if ((ypos + h) > DISP_MAX_Y_SIZE)
+ h = DISP_MAX_Y_SIZE - ypos;
+
+ /* assume 1 display only */
+ k.disp_no = 0;
+ k.xmin = xpos;
+ k.ymin = ypos;
+ k.xmax = xpos + (w - 1);
+ k.ymax = ypos + (h - 1);
+
+ /* adjust min and max values if necessary */
+ if (k.xmin > DISP_MAX_X_SIZE - 1)
+ k.xmin = DISP_MAX_X_SIZE - 1;
+ if (k.ymin > DISP_MAX_Y_SIZE - 1)
+ k.ymin = DISP_MAX_Y_SIZE - 1;
+
+ if (k.xmax > DISP_MAX_X_SIZE - 1)
+ k.xmax = DISP_MAX_X_SIZE - 1;
+ if (k.ymax > DISP_MAX_Y_SIZE - 1)
+ k.ymax = DISP_MAX_Y_SIZE - 1;
+
+ k.xmirror = 0;
+ k.ymirror = 0;
+ k.rotate = 0;
+ k.minadr = (u32) frame_buffer;
+ k.maxadr = (u32) frame_buffer + (((w - 1) << 10) | ((h << 2) - 2));
+ k.pad = PAD_1024;
+ k.dirtybuffer = (u32) dirty_buffer;
+ k.format = RGB888;
+ k.hwdirty = 0;
+ k.slave_trans = 0;
+
+ ret = dum_ch_setup(ch_no, &k);
+
+ return ret;
+}
+
+static void lcd_reset(void)
+{
+ u32 *dum_pio_base = (u32 *)IO_ADDRESS(PNX4008_PIO_BASE);
+
+ udelay(1);
+ iowrite32(BIT(19), &dum_pio_base[2]);
+ udelay(1);
+ iowrite32(BIT(19), &dum_pio_base[1]);
+ udelay(1);
+}
+
+static int dum_init(struct platform_device *pdev)
+{
+ struct clk *clk;
+
+ /* enable DUM clock */
+ clk = clk_get(&pdev->dev, "dum_ck");
+ if (IS_ERR(clk)) {
+ printk(KERN_ERR "pnx4008_dum: Unable to access DUM clock\n");
+ return PTR_ERR(clk);
+ }
+
+ clk_set_rate(clk, 1);
+ clk_put(clk);
+
+ DUM_CTRL = V_DUM_RESET;
+
+ /* set priority to "round-robin". All other params to "false" */
+ DUM_CONF = BIT(9);
+
+ /* Display 1 */
+ DUM_WTCFG1 = PNX4008_DUM_WT_CFG;
+ DUM_RTCFG1 = PNX4008_DUM_RT_CFG;
+ DUM_TCFG = PNX4008_DUM_T_CFG;
+
+ return 0;
+}
+
+static void dum_chan_init(void)
+{
+ int i = 0, ch = 0;
+ u32 *cmdptrs;
+ u32 *cmdstrings;
+
+ DUM_COM_BASE =
+ CMDSTRING_BASEADDR + BYTES_PER_CMDSTRING * NR_OF_CMDSTRINGS;
+
+ if ((cmdptrs =
+ (u32 *) ioremap_nocache(DUM_COM_BASE,
+ sizeof(u32) * NR_OF_CMDSTRINGS)) == NULL)
+ return;
+
+ for (ch = 0; ch < NR_OF_CMDSTRINGS; ch++)
+ iowrite32(CMDSTRING_BASEADDR + BYTES_PER_CMDSTRING * ch,
+ cmdptrs + ch);
+
+ for (ch = 0; ch < MAX_DUM_CHANNELS; ch++)
+ clear_channel(ch);
+
+ /* Clear the cmdstrings */
+ cmdstrings =
+ (u32 *)ioremap_nocache(*cmdptrs,
+ BYTES_PER_CMDSTRING * NR_OF_CMDSTRINGS);
+
+ if (!cmdstrings)
+ goto out;
+
+ for (i = 0; i < NR_OF_CMDSTRINGS * BYTES_PER_CMDSTRING / sizeof(u32);
+ i++)
+ iowrite32(0, cmdstrings + i);
+
+ iounmap((u32 *)cmdstrings);
+
+out:
+ iounmap((u32 *)cmdptrs);
+}
+
+static void lcd_init(void)
+{
+ lcd_reset();
+
+ DUM_OUTP_FORMAT1 = 0; /* RGB666 */
+
+ udelay(1);
+ iowrite32(V_LCD_STANDBY_OFF, dum_data.slave_virt_base);
+ udelay(1);
+ iowrite32(V_LCD_USE_9BIT_BUS, dum_data.slave_virt_base);
+ udelay(1);
+ iowrite32(V_LCD_SYNC_RISE_L, dum_data.slave_virt_base);
+ udelay(1);
+ iowrite32(V_LCD_SYNC_RISE_H, dum_data.slave_virt_base);
+ udelay(1);
+ iowrite32(V_LCD_SYNC_FALL_L, dum_data.slave_virt_base);
+ udelay(1);
+ iowrite32(V_LCD_SYNC_FALL_H, dum_data.slave_virt_base);
+ udelay(1);
+ iowrite32(V_LCD_SYNC_ENABLE, dum_data.slave_virt_base);
+ udelay(1);
+ iowrite32(V_LCD_DISPLAY_ON, dum_data.slave_virt_base);
+ udelay(1);
+}
+
+/* Interface exported to framebuffer drivers */
+
+int pnx4008_get_fb_addresses(int fb_type, void **virt_addr,
+ dma_addr_t *phys_addr, int *fb_length)
+{
+ int i;
+ int ret = -1;
+ for (i = 0; i < ARRAY_SIZE(fb_addr); i++)
+ if (fb_addr[i].fb_type == fb_type) {
+ *virt_addr = (void *)(dum_data.lcd_virt_start +
+ fb_addr[i].addr_offset);
+ *phys_addr =
+ dum_data.lcd_phys_start + fb_addr[i].addr_offset;
+ *fb_length = fb_addr[i].fb_length;
+ ret = 0;
+ break;
+ }
+
+ return ret;
+}
+
+EXPORT_SYMBOL(pnx4008_get_fb_addresses);
+
+int pnx4008_alloc_dum_channel(int dev_id)
+{
+ int i = 0;
+
+ while ((i < MAX_DUM_CHANNELS) && (dum_data.fb_owning_channel[i] != -1))
+ i++;
+
+ if (i == MAX_DUM_CHANNELS)
+ return -ENORESOURCESLEFT;
+ else {
+ dum_data.fb_owning_channel[i] = dev_id;
+ return i;
+ }
+}
+
+EXPORT_SYMBOL(pnx4008_alloc_dum_channel);
+
+int pnx4008_free_dum_channel(int channr, int dev_id)
+{
+ if (channr < 0 || channr > MAX_DUM_CHANNELS)
+ return -EINVAL;
+ else if (dum_data.fb_owning_channel[channr] != dev_id)
+ return -EFBNOTOWNER;
+ else {
+ clear_channel(channr);
+ dum_data.fb_owning_channel[channr] = -1;
+ }
+
+ return 0;
+}
+
+EXPORT_SYMBOL(pnx4008_free_dum_channel);
+
+int pnx4008_put_dum_channel_uf(struct dumchannel_uf chan_uf, int dev_id)
+{
+ int i = chan_uf.channelnr;
+ int ret;
+
+ if (i < 0 || i > MAX_DUM_CHANNELS)
+ return -EINVAL;
+ else if (dum_data.fb_owning_channel[i] != dev_id)
+ return -EFBNOTOWNER;
+ else if ((ret =
+ display_open(chan_uf.channelnr, 0, chan_uf.dirty,
+ chan_uf.source, chan_uf.y_offset,
+ chan_uf.x_offset, chan_uf.height,
+ chan_uf.width)) != 0)
+ return ret;
+ else {
+ dum_data.chan_uf_store[i].dirty = chan_uf.dirty;
+ dum_data.chan_uf_store[i].source = chan_uf.source;
+ dum_data.chan_uf_store[i].x_offset = chan_uf.x_offset;
+ dum_data.chan_uf_store[i].y_offset = chan_uf.y_offset;
+ dum_data.chan_uf_store[i].width = chan_uf.width;
+ dum_data.chan_uf_store[i].height = chan_uf.height;
+ }
+
+ return 0;
+}
+
+EXPORT_SYMBOL(pnx4008_put_dum_channel_uf);
+
+int pnx4008_set_dum_channel_sync(int channr, int val, int dev_id)
+{
+ if (channr < 0 || channr > MAX_DUM_CHANNELS)
+ return -EINVAL;
+ else if (dum_data.fb_owning_channel[channr] != dev_id)
+ return -EFBNOTOWNER;
+ else {
+ if (val == CONF_SYNC_ON) {
+ DUM_CH_CONF(channr) |= CONF_SYNCENABLE;
+ DUM_CH_CONF(channr) |= DUM_CHANNEL_CFG_SYNC_MASK |
+ DUM_CHANNEL_CFG_SYNC_MASK_SET;
+ } else if (val == CONF_SYNC_OFF)
+ DUM_CH_CONF(channr) &= ~CONF_SYNCENABLE;
+ else
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+EXPORT_SYMBOL(pnx4008_set_dum_channel_sync);
+
+int pnx4008_set_dum_channel_dirty_detect(int channr, int val, int dev_id)
+{
+ if (channr < 0 || channr > MAX_DUM_CHANNELS)
+ return -EINVAL;
+ else if (dum_data.fb_owning_channel[channr] != dev_id)
+ return -EFBNOTOWNER;
+ else {
+ if (val == CONF_DIRTYDETECTION_ON)
+ DUM_CH_CONF(channr) |= CONF_DIRTYENABLE;
+ else if (val == CONF_DIRTYDETECTION_OFF)
+ DUM_CH_CONF(channr) &= ~CONF_DIRTYENABLE;
+ else
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+EXPORT_SYMBOL(pnx4008_set_dum_channel_dirty_detect);
+
+#if 0 /* Functions not used currently, but likely to be used in future */
+
+static int get_channel(struct dumchannel *p_chan)
+{
+ int i = p_chan->channelnr;
+
+ if (i < 0 || i > MAX_DUM_CHANNELS)
+ return -EINVAL;
+ else {
+ p_chan->dum_ch_min = DUM_CH_MIN(i);
+ p_chan->dum_ch_max = DUM_CH_MAX(i);
+ p_chan->dum_ch_conf = DUM_CH_CONF(i);
+ p_chan->dum_ch_stat = DUM_CH_STAT(i);
+ p_chan->dum_ch_ctrl = 0; /* WriteOnly control register */
+ }
+
+ return 0;
+}
+
+int pnx4008_get_dum_channel_uf(struct dumchannel_uf *p_chan_uf, int dev_id)
+{
+ int i = p_chan_uf->channelnr;
+
+ if (i < 0 || i > MAX_DUM_CHANNELS)
+ return -EINVAL;
+ else if (dum_data.fb_owning_channel[i] != dev_id)
+ return -EFBNOTOWNER;
+ else {
+ p_chan_uf->dirty = dum_data.chan_uf_store[i].dirty;
+ p_chan_uf->source = dum_data.chan_uf_store[i].source;
+ p_chan_uf->x_offset = dum_data.chan_uf_store[i].x_offset;
+ p_chan_uf->y_offset = dum_data.chan_uf_store[i].y_offset;
+ p_chan_uf->width = dum_data.chan_uf_store[i].width;
+ p_chan_uf->height = dum_data.chan_uf_store[i].height;
+ }
+
+ return 0;
+}
+
+EXPORT_SYMBOL(pnx4008_get_dum_channel_uf);
+
+int pnx4008_get_dum_channel_config(int channr, int dev_id)
+{
+ int ret;
+ struct dumchannel chan;
+
+ if (channr < 0 || channr > MAX_DUM_CHANNELS)
+ return -EINVAL;
+ else if (dum_data.fb_owning_channel[channr] != dev_id)
+ return -EFBNOTOWNER;
+ else {
+ chan.channelnr = channr;
+ if ((ret = get_channel(&chan)) != 0)
+ return ret;
+ }
+
+ return (chan.dum_ch_conf & DUM_CHANNEL_CFG_MASK);
+}
+
+EXPORT_SYMBOL(pnx4008_get_dum_channel_config);
+
+int pnx4008_force_update_dum_channel(int channr, int dev_id)
+{
+ if (channr < 0 || channr > MAX_DUM_CHANNELS)
+ return -EINVAL;
+
+ else if (dum_data.fb_owning_channel[channr] != dev_id)
+ return -EFBNOTOWNER;
+ else
+ DUM_CH_CTRL(channr) = CTRL_SETDIRTY;
+
+ return 0;
+}
+
+EXPORT_SYMBOL(pnx4008_force_update_dum_channel);
+
+#endif
+
+int pnx4008_sdum_mmap(struct fb_info *info, struct vm_area_struct *vma,
+ struct device *dev)
+{
+ unsigned long off = vma->vm_pgoff << PAGE_SHIFT;
+
+ if (off < info->fix.smem_len) {
+ vma->vm_pgoff += 1;
+ return dma_mmap_writecombine(dev, vma,
+ (void *)dum_data.lcd_virt_start,
+ dum_data.lcd_phys_start,
+ FB_DMA_SIZE);
+ }
+ return -EINVAL;
+}
+
+EXPORT_SYMBOL(pnx4008_sdum_mmap);
+
+int pnx4008_set_dum_exit_notification(int dev_id)
+{
+ int i;
+
+ for (i = 0; i < MAX_DUM_CHANNELS; i++)
+ if (dum_data.fb_owning_channel[i] == dev_id)
+ return -ERESOURCESNOTFREED;
+
+ return 0;
+}
+
+EXPORT_SYMBOL(pnx4008_set_dum_exit_notification);
+
+/* Platform device driver for DUM */
+
+static int sdum_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ int retval = 0;
+ struct clk *clk;
+
+ clk = clk_get(0, "dum_ck");
+ if (!IS_ERR(clk)) {
+ clk_set_rate(clk, 0);
+ clk_put(clk);
+ } else
+ retval = PTR_ERR(clk);
+
+ /* disable BAC */
+ DUM_CTRL = V_BAC_DISABLE_IDLE;
+
+ /* LCD standby & turn off display */
+ lcd_reset();
+
+ return retval;
+}
+
+static int sdum_resume(struct platform_device *pdev)
+{
+ int retval = 0;
+ struct clk *clk;
+
+ clk = clk_get(0, "dum_ck");
+ if (!IS_ERR(clk)) {
+ clk_set_rate(clk, 1);
+ clk_put(clk);
+ } else
+ retval = PTR_ERR(clk);
+
+ /* wait for BAC disable */
+ DUM_CTRL = V_BAC_DISABLE_TRIG;
+
+ while (DUM_CTRL & BAC_ENABLED)
+ udelay(10);
+
+ /* re-init LCD */
+ lcd_init();
+
+ /* enable BAC and reset MUX */
+ DUM_CTRL = V_BAC_ENABLE;
+ udelay(1);
+ DUM_CTRL = V_MUX_RESET;
+ return 0;
+}
+
+static int __devinit sdum_probe(struct platform_device *pdev)
+{
+ int ret = 0, i = 0;
+
+ /* map frame buffer */
+ dum_data.lcd_virt_start = (u32) dma_alloc_writecombine(&pdev->dev,
+ FB_DMA_SIZE,
+ &dum_data.lcd_phys_start,
+ GFP_KERNEL);
+
+ if (!dum_data.lcd_virt_start) {
+ ret = -ENOMEM;
+ goto out_3;
+ }
+
+ /* map slave registers */
+ dum_data.slave_phys_base = PNX4008_DUM_SLAVE_BASE;
+ dum_data.slave_virt_base =
+ (u32 *) ioremap_nocache(dum_data.slave_phys_base, sizeof(u32));
+
+ if (dum_data.slave_virt_base == NULL) {
+ ret = -ENOMEM;
+ goto out_2;
+ }
+
+ /* initialize DUM and LCD display */
+ ret = dum_init(pdev);
+ if (ret)
+ goto out_1;
+
+ dum_chan_init();
+ lcd_init();
+
+ DUM_CTRL = V_BAC_ENABLE;
+ udelay(1);
+ DUM_CTRL = V_MUX_RESET;
+
+ /* set decode address and sync clock divider */
+ DUM_DECODE = dum_data.lcd_phys_start & DUM_DECODE_MASK;
+ DUM_CLK_DIV = PNX4008_DUM_CLK_DIV;
+
+ for (i = 0; i < MAX_DUM_CHANNELS; i++)
+ dum_data.fb_owning_channel[i] = -1;
+
+ /*setup wakeup interrupt */
+ start_int_set_rising_edge(SE_DISP_SYNC_INT);
+ start_int_ack(SE_DISP_SYNC_INT);
+ start_int_umask(SE_DISP_SYNC_INT);
+
+ return 0;
+
+out_1:
+ iounmap((void *)dum_data.slave_virt_base);
+out_2:
+ dma_free_writecombine(&pdev->dev, FB_DMA_SIZE,
+ (void *)dum_data.lcd_virt_start,
+ dum_data.lcd_phys_start);
+out_3:
+ return ret;
+}
+
+static int sdum_remove(struct platform_device *pdev)
+{
+ struct clk *clk;
+
+ start_int_mask(SE_DISP_SYNC_INT);
+
+ clk = clk_get(0, "dum_ck");
+ if (!IS_ERR(clk)) {
+ clk_set_rate(clk, 0);
+ clk_put(clk);
+ }
+
+ iounmap((void *)dum_data.slave_virt_base);
+
+ dma_free_writecombine(&pdev->dev, FB_DMA_SIZE,
+ (void *)dum_data.lcd_virt_start,
+ dum_data.lcd_phys_start);
+
+ return 0;
+}
+
+static struct platform_driver sdum_driver = {
+ .driver = {
+ .name = "sdum",
+ },
+ .probe = sdum_probe,
+ .remove = sdum_remove,
+ .suspend = sdum_suspend,
+ .resume = sdum_resume,
+};
+
+int __init sdum_init(void)
+{
+ return platform_driver_register(&sdum_driver);
+}
+
+static void __exit sdum_exit(void)
+{
+ platform_driver_unregister(&sdum_driver);
+};
+
+module_init(sdum_init);
+module_exit(sdum_exit);
+
+MODULE_LICENSE("GPL");
git://git.onelab.eu / linux-2.6.git / blobdiff