summaryrefslogtreecommitdiff
path: root/drivers/video/omap/rfbi.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/video/omap/rfbi.c')
-rw-r--r--drivers/video/omap/rfbi.c598
1 files changed, 0 insertions, 598 deletions
diff --git a/drivers/video/omap/rfbi.c b/drivers/video/omap/rfbi.c
deleted file mode 100644
index 2c1a3402bef0..000000000000
--- a/drivers/video/omap/rfbi.c
+++ /dev/null
@@ -1,598 +0,0 @@
-/*
- * OMAP2 Remote Frame Buffer Interface support
- *
- * Copyright (C) 2005 Nokia Corporation
- * Author: Juha Yrjölä <juha.yrjola@nokia.com>
- * Imre Deak <imre.deak@nokia.com>
- *
- * 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.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/i2c.h>
-#include <linux/err.h>
-#include <linux/interrupt.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/platform_device.h>
-
-#include "omapfb.h"
-#include "dispc.h"
-
-/* To work around an RFBI transfer rate limitation */
-#define OMAP_RFBI_RATE_LIMIT 1
-
-#define RFBI_BASE 0x48050800
-#define RFBI_REVISION 0x0000
-#define RFBI_SYSCONFIG 0x0010
-#define RFBI_SYSSTATUS 0x0014
-#define RFBI_CONTROL 0x0040
-#define RFBI_PIXEL_CNT 0x0044
-#define RFBI_LINE_NUMBER 0x0048
-#define RFBI_CMD 0x004c
-#define RFBI_PARAM 0x0050
-#define RFBI_DATA 0x0054
-#define RFBI_READ 0x0058
-#define RFBI_STATUS 0x005c
-#define RFBI_CONFIG0 0x0060
-#define RFBI_ONOFF_TIME0 0x0064
-#define RFBI_CYCLE_TIME0 0x0068
-#define RFBI_DATA_CYCLE1_0 0x006c
-#define RFBI_DATA_CYCLE2_0 0x0070
-#define RFBI_DATA_CYCLE3_0 0x0074
-#define RFBI_VSYNC_WIDTH 0x0090
-#define RFBI_HSYNC_WIDTH 0x0094
-
-#define DISPC_BASE 0x48050400
-#define DISPC_CONTROL 0x0040
-#define DISPC_IRQ_FRAMEMASK 0x0001
-
-static struct {
- void __iomem *base;
- void (*lcdc_callback)(void *data);
- void *lcdc_callback_data;
- unsigned long l4_khz;
- int bits_per_cycle;
- struct omapfb_device *fbdev;
- struct clk *dss_ick;
- struct clk *dss1_fck;
- unsigned tearsync_pin_cnt;
- unsigned tearsync_mode;
-} rfbi;
-
-static inline void rfbi_write_reg(int idx, u32 val)
-{
- __raw_writel(val, rfbi.base + idx);
-}
-
-static inline u32 rfbi_read_reg(int idx)
-{
- return __raw_readl(rfbi.base + idx);
-}
-
-static int rfbi_get_clocks(void)
-{
- rfbi.dss_ick = clk_get(&rfbi.fbdev->dssdev->dev, "ick");
- if (IS_ERR(rfbi.dss_ick)) {
- dev_err(rfbi.fbdev->dev, "can't get ick\n");
- return PTR_ERR(rfbi.dss_ick);
- }
-
- rfbi.dss1_fck = clk_get(&rfbi.fbdev->dssdev->dev, "fck");
- if (IS_ERR(rfbi.dss1_fck)) {
- dev_err(rfbi.fbdev->dev, "can't get dss1_fck\n");
- clk_put(rfbi.dss_ick);
- return PTR_ERR(rfbi.dss1_fck);
- }
-
- return 0;
-}
-
-static void rfbi_put_clocks(void)
-{
- clk_put(rfbi.dss1_fck);
- clk_put(rfbi.dss_ick);
-}
-
-static void rfbi_enable_clocks(int enable)
-{
- if (enable) {
- clk_enable(rfbi.dss_ick);
- clk_enable(rfbi.dss1_fck);
- } else {
- clk_disable(rfbi.dss1_fck);
- clk_disable(rfbi.dss_ick);
- }
-}
-
-
-#ifdef VERBOSE
-static void rfbi_print_timings(void)
-{
- u32 l;
- u32 time;
-
- l = rfbi_read_reg(RFBI_CONFIG0);
- time = 1000000000 / rfbi.l4_khz;
- if (l & (1 << 4))
- time *= 2;
-
- dev_dbg(rfbi.fbdev->dev, "Tick time %u ps\n", time);
- l = rfbi_read_reg(RFBI_ONOFF_TIME0);
- dev_dbg(rfbi.fbdev->dev,
- "CSONTIME %d, CSOFFTIME %d, WEONTIME %d, WEOFFTIME %d, "
- "REONTIME %d, REOFFTIME %d\n",
- l & 0x0f, (l >> 4) & 0x3f, (l >> 10) & 0x0f, (l >> 14) & 0x3f,
- (l >> 20) & 0x0f, (l >> 24) & 0x3f);
-
- l = rfbi_read_reg(RFBI_CYCLE_TIME0);
- dev_dbg(rfbi.fbdev->dev,
- "WECYCLETIME %d, RECYCLETIME %d, CSPULSEWIDTH %d, "
- "ACCESSTIME %d\n",
- (l & 0x3f), (l >> 6) & 0x3f, (l >> 12) & 0x3f,
- (l >> 22) & 0x3f);
-}
-#else
-static void rfbi_print_timings(void) {}
-#endif
-
-static void rfbi_set_timings(const struct extif_timings *t)
-{
- u32 l;
-
- BUG_ON(!t->converted);
-
- rfbi_enable_clocks(1);
- rfbi_write_reg(RFBI_ONOFF_TIME0, t->tim[0]);
- rfbi_write_reg(RFBI_CYCLE_TIME0, t->tim[1]);
-
- l = rfbi_read_reg(RFBI_CONFIG0);
- l &= ~(1 << 4);
- l |= (t->tim[2] ? 1 : 0) << 4;
- rfbi_write_reg(RFBI_CONFIG0, l);
-
- rfbi_print_timings();
- rfbi_enable_clocks(0);
-}
-
-static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div)
-{
- *clk_period = 1000000000 / rfbi.l4_khz;
- *max_clk_div = 2;
-}
-
-static int ps_to_rfbi_ticks(int time, int div)
-{
- unsigned long tick_ps;
- int ret;
-
- /* Calculate in picosecs to yield more exact results */
- tick_ps = 1000000000 / (rfbi.l4_khz) * div;
-
- ret = (time + tick_ps - 1) / tick_ps;
-
- return ret;
-}
-
-#ifdef OMAP_RFBI_RATE_LIMIT
-static unsigned long rfbi_get_max_tx_rate(void)
-{
- unsigned long l4_rate, dss1_rate;
- int min_l4_ticks = 0;
- int i;
-
- /* According to TI this can't be calculated so make the
- * adjustments for a couple of known frequencies and warn for
- * others.
- */
- static const struct {
- unsigned long l4_clk; /* HZ */
- unsigned long dss1_clk; /* HZ */
- unsigned long min_l4_ticks;
- } ftab[] = {
- { 55, 132, 7, }, /* 7.86 MPix/s */
- { 110, 110, 12, }, /* 9.16 MPix/s */
- { 110, 132, 10, }, /* 11 Mpix/s */
- { 120, 120, 10, }, /* 12 Mpix/s */
- { 133, 133, 10, }, /* 13.3 Mpix/s */
- };
-
- l4_rate = rfbi.l4_khz / 1000;
- dss1_rate = clk_get_rate(rfbi.dss1_fck) / 1000000;
-
- for (i = 0; i < ARRAY_SIZE(ftab); i++) {
- /* Use a window instead of an exact match, to account
- * for different DPLL multiplier / divider pairs.
- */
- if (abs(ftab[i].l4_clk - l4_rate) < 3 &&
- abs(ftab[i].dss1_clk - dss1_rate) < 3) {
- min_l4_ticks = ftab[i].min_l4_ticks;
- break;
- }
- }
- if (i == ARRAY_SIZE(ftab)) {
- /* Can't be sure, return anyway the maximum not
- * rate-limited. This might cause a problem only for the
- * tearing synchronisation.
- */
- dev_err(rfbi.fbdev->dev,
- "can't determine maximum RFBI transfer rate\n");
- return rfbi.l4_khz * 1000;
- }
- return rfbi.l4_khz * 1000 / min_l4_ticks;
-}
-#else
-static int rfbi_get_max_tx_rate(void)
-{
- return rfbi.l4_khz * 1000;
-}
-#endif
-
-
-static int rfbi_convert_timings(struct extif_timings *t)
-{
- u32 l;
- int reon, reoff, weon, weoff, cson, csoff, cs_pulse;
- int actim, recyc, wecyc;
- int div = t->clk_div;
-
- if (div <= 0 || div > 2)
- return -1;
-
- /* Make sure that after conversion it still holds that:
- * weoff > weon, reoff > reon, recyc >= reoff, wecyc >= weoff,
- * csoff > cson, csoff >= max(weoff, reoff), actim > reon
- */
- weon = ps_to_rfbi_ticks(t->we_on_time, div);
- weoff = ps_to_rfbi_ticks(t->we_off_time, div);
- if (weoff <= weon)
- weoff = weon + 1;
- if (weon > 0x0f)
- return -1;
- if (weoff > 0x3f)
- return -1;
-
- reon = ps_to_rfbi_ticks(t->re_on_time, div);
- reoff = ps_to_rfbi_ticks(t->re_off_time, div);
- if (reoff <= reon)
- reoff = reon + 1;
- if (reon > 0x0f)
- return -1;
- if (reoff > 0x3f)
- return -1;
-
- cson = ps_to_rfbi_ticks(t->cs_on_time, div);
- csoff = ps_to_rfbi_ticks(t->cs_off_time, div);
- if (csoff <= cson)
- csoff = cson + 1;
- if (csoff < max(weoff, reoff))
- csoff = max(weoff, reoff);
- if (cson > 0x0f)
- return -1;
- if (csoff > 0x3f)
- return -1;
-
- l = cson;
- l |= csoff << 4;
- l |= weon << 10;
- l |= weoff << 14;
- l |= reon << 20;
- l |= reoff << 24;
-
- t->tim[0] = l;
-
- actim = ps_to_rfbi_ticks(t->access_time, div);
- if (actim <= reon)
- actim = reon + 1;
- if (actim > 0x3f)
- return -1;
-
- wecyc = ps_to_rfbi_ticks(t->we_cycle_time, div);
- if (wecyc < weoff)
- wecyc = weoff;
- if (wecyc > 0x3f)
- return -1;
-
- recyc = ps_to_rfbi_ticks(t->re_cycle_time, div);
- if (recyc < reoff)
- recyc = reoff;
- if (recyc > 0x3f)
- return -1;
-
- cs_pulse = ps_to_rfbi_ticks(t->cs_pulse_width, div);
- if (cs_pulse > 0x3f)
- return -1;
-
- l = wecyc;
- l |= recyc << 6;
- l |= cs_pulse << 12;
- l |= actim << 22;
-
- t->tim[1] = l;
-
- t->tim[2] = div - 1;
-
- t->converted = 1;
-
- return 0;
-}
-
-static int rfbi_setup_tearsync(unsigned pin_cnt,
- unsigned hs_pulse_time, unsigned vs_pulse_time,
- int hs_pol_inv, int vs_pol_inv, int extif_div)
-{
- int hs, vs;
- int min;
- u32 l;
-
- if (pin_cnt != 1 && pin_cnt != 2)
- return -EINVAL;
-
- hs = ps_to_rfbi_ticks(hs_pulse_time, 1);
- vs = ps_to_rfbi_ticks(vs_pulse_time, 1);
- if (hs < 2)
- return -EDOM;
- if (pin_cnt == 2)
- min = 2;
- else
- min = 4;
- if (vs < min)
- return -EDOM;
- if (vs == hs)
- return -EINVAL;
- rfbi.tearsync_pin_cnt = pin_cnt;
- dev_dbg(rfbi.fbdev->dev,
- "setup_tearsync: pins %d hs %d vs %d hs_inv %d vs_inv %d\n",
- pin_cnt, hs, vs, hs_pol_inv, vs_pol_inv);
-
- rfbi_enable_clocks(1);
- rfbi_write_reg(RFBI_HSYNC_WIDTH, hs);
- rfbi_write_reg(RFBI_VSYNC_WIDTH, vs);
-
- l = rfbi_read_reg(RFBI_CONFIG0);
- if (hs_pol_inv)
- l &= ~(1 << 21);
- else
- l |= 1 << 21;
- if (vs_pol_inv)
- l &= ~(1 << 20);
- else
- l |= 1 << 20;
- rfbi_enable_clocks(0);
-
- return 0;
-}
-
-static int rfbi_enable_tearsync(int enable, unsigned line)
-{
- u32 l;
-
- dev_dbg(rfbi.fbdev->dev, "tearsync %d line %d mode %d\n",
- enable, line, rfbi.tearsync_mode);
- if (line > (1 << 11) - 1)
- return -EINVAL;
-
- rfbi_enable_clocks(1);
- l = rfbi_read_reg(RFBI_CONFIG0);
- l &= ~(0x3 << 2);
- if (enable) {
- rfbi.tearsync_mode = rfbi.tearsync_pin_cnt;
- l |= rfbi.tearsync_mode << 2;
- } else
- rfbi.tearsync_mode = 0;
- rfbi_write_reg(RFBI_CONFIG0, l);
- rfbi_write_reg(RFBI_LINE_NUMBER, line);
- rfbi_enable_clocks(0);
-
- return 0;
-}
-
-static void rfbi_write_command(const void *buf, unsigned int len)
-{
- rfbi_enable_clocks(1);
- if (rfbi.bits_per_cycle == 16) {
- const u16 *w = buf;
- BUG_ON(len & 1);
- for (; len; len -= 2)
- rfbi_write_reg(RFBI_CMD, *w++);
- } else {
- const u8 *b = buf;
- BUG_ON(rfbi.bits_per_cycle != 8);
- for (; len; len--)
- rfbi_write_reg(RFBI_CMD, *b++);
- }
- rfbi_enable_clocks(0);
-}
-
-static void rfbi_read_data(void *buf, unsigned int len)
-{
- rfbi_enable_clocks(1);
- if (rfbi.bits_per_cycle == 16) {
- u16 *w = buf;
- BUG_ON(len & ~1);
- for (; len; len -= 2) {
- rfbi_write_reg(RFBI_READ, 0);
- *w++ = rfbi_read_reg(RFBI_READ);
- }
- } else {
- u8 *b = buf;
- BUG_ON(rfbi.bits_per_cycle != 8);
- for (; len; len--) {
- rfbi_write_reg(RFBI_READ, 0);
- *b++ = rfbi_read_reg(RFBI_READ);
- }
- }
- rfbi_enable_clocks(0);
-}
-
-static void rfbi_write_data(const void *buf, unsigned int len)
-{
- rfbi_enable_clocks(1);
- if (rfbi.bits_per_cycle == 16) {
- const u16 *w = buf;
- BUG_ON(len & 1);
- for (; len; len -= 2)
- rfbi_write_reg(RFBI_PARAM, *w++);
- } else {
- const u8 *b = buf;
- BUG_ON(rfbi.bits_per_cycle != 8);
- for (; len; len--)
- rfbi_write_reg(RFBI_PARAM, *b++);
- }
- rfbi_enable_clocks(0);
-}
-
-static void rfbi_transfer_area(int width, int height,
- void (callback)(void * data), void *data)
-{
- u32 w;
-
- BUG_ON(callback == NULL);
-
- rfbi_enable_clocks(1);
- omap_dispc_set_lcd_size(width, height);
-
- rfbi.lcdc_callback = callback;
- rfbi.lcdc_callback_data = data;
-
- rfbi_write_reg(RFBI_PIXEL_CNT, width * height);
-
- w = rfbi_read_reg(RFBI_CONTROL);
- w |= 1; /* enable */
- if (!rfbi.tearsync_mode)
- w |= 1 << 4; /* internal trigger, reset by HW */
- rfbi_write_reg(RFBI_CONTROL, w);
-
- omap_dispc_enable_lcd_out(1);
-}
-
-static inline void _stop_transfer(void)
-{
- u32 w;
-
- w = rfbi_read_reg(RFBI_CONTROL);
- rfbi_write_reg(RFBI_CONTROL, w & ~(1 << 0));
- rfbi_enable_clocks(0);
-}
-
-static void rfbi_dma_callback(void *data)
-{
- _stop_transfer();
- rfbi.lcdc_callback(rfbi.lcdc_callback_data);
-}
-
-static void rfbi_set_bits_per_cycle(int bpc)
-{
- u32 l;
-
- rfbi_enable_clocks(1);
- l = rfbi_read_reg(RFBI_CONFIG0);
- l &= ~(0x03 << 0);
-
- switch (bpc) {
- case 8:
- break;
- case 16:
- l |= 3;
- break;
- default:
- BUG();
- }
- rfbi_write_reg(RFBI_CONFIG0, l);
- rfbi.bits_per_cycle = bpc;
- rfbi_enable_clocks(0);
-}
-
-static int rfbi_init(struct omapfb_device *fbdev)
-{
- u32 l;
- int r;
-
- rfbi.fbdev = fbdev;
- rfbi.base = ioremap(RFBI_BASE, SZ_1K);
- if (!rfbi.base) {
- dev_err(fbdev->dev, "can't ioremap RFBI\n");
- return -ENOMEM;
- }
-
- if ((r = rfbi_get_clocks()) < 0)
- return r;
- rfbi_enable_clocks(1);
-
- rfbi.l4_khz = clk_get_rate(rfbi.dss_ick) / 1000;
-
- /* Reset */
- rfbi_write_reg(RFBI_SYSCONFIG, 1 << 1);
- while (!(rfbi_read_reg(RFBI_SYSSTATUS) & (1 << 0)));
-
- l = rfbi_read_reg(RFBI_SYSCONFIG);
- /* Enable autoidle and smart-idle */
- l |= (1 << 0) | (2 << 3);
- rfbi_write_reg(RFBI_SYSCONFIG, l);
-
- /* 16-bit interface, ITE trigger mode, 16-bit data */
- l = (0x03 << 0) | (0x00 << 2) | (0x01 << 5) | (0x02 << 7);
- l |= (0 << 9) | (1 << 20) | (1 << 21);
- rfbi_write_reg(RFBI_CONFIG0, l);
-
- rfbi_write_reg(RFBI_DATA_CYCLE1_0, 0x00000010);
-
- l = rfbi_read_reg(RFBI_CONTROL);
- /* Select CS0, clear bypass mode */
- l = (0x01 << 2);
- rfbi_write_reg(RFBI_CONTROL, l);
-
- r = omap_dispc_request_irq(DISPC_IRQ_FRAMEMASK, rfbi_dma_callback,
- NULL);
- if (r < 0) {
- dev_err(fbdev->dev, "can't get DISPC irq\n");
- rfbi_enable_clocks(0);
- return r;
- }
-
- l = rfbi_read_reg(RFBI_REVISION);
- pr_info("omapfb: RFBI version %d.%d initialized\n",
- (l >> 4) & 0x0f, l & 0x0f);
-
- rfbi_enable_clocks(0);
-
- return 0;
-}
-
-static void rfbi_cleanup(void)
-{
- omap_dispc_free_irq(DISPC_IRQ_FRAMEMASK, rfbi_dma_callback, NULL);
- rfbi_put_clocks();
- iounmap(rfbi.base);
-}
-
-const struct lcd_ctrl_extif omap2_ext_if = {
- .init = rfbi_init,
- .cleanup = rfbi_cleanup,
- .get_clk_info = rfbi_get_clk_info,
- .get_max_tx_rate = rfbi_get_max_tx_rate,
- .set_bits_per_cycle = rfbi_set_bits_per_cycle,
- .convert_timings = rfbi_convert_timings,
- .set_timings = rfbi_set_timings,
- .write_command = rfbi_write_command,
- .read_data = rfbi_read_data,
- .write_data = rfbi_write_data,
- .transfer_area = rfbi_transfer_area,
- .setup_tearsync = rfbi_setup_tearsync,
- .enable_tearsync = rfbi_enable_tearsync,
-
- .max_transmit_size = (u32) ~0,
-};
-
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-25 10:50:49 +0300