[patch 4/6] jbt6k74: Add QVGA support
Stefan Schmidt
stefan at openmoko.org
Thu Oct 18 14:05:44 CEST 2007
Add register init and extend state machine to support QVGA on the LCM.
Signed-off-by: Stefan Schmidt <stefan at openmoko.org>
Index: linux-2.6.22.5/drivers/spi/jbt6k74.c
===================================================================
--- linux-2.6.22.5.orig/drivers/spi/jbt6k74.c 2007-10-18 14:55:44.000000000 +0800
+++ linux-2.6.22.5/drivers/spi/jbt6k74.c 2007-10-18 15:06:40.000000000 +0800
@@ -1,7 +1,8 @@
/* Linux kernel driver for the tpo JBT6K74-AS LCM ASIC
*
* Copyright (C) 2006-2007 by OpenMoko, Inc.
- * Author: Harald Welte <laforge at openmoko.org>
+ * Author: Harald Welte <laforge at openmoko.org>,
+ * Stefan Schmidt <stefan at openmoko.org>
* All rights reserved.
*
* This program is free software; you can redistribute it and/or
@@ -69,6 +70,7 @@
JBT_REG_GAMMA1_INCLINATION = 0xc9,
JBT_REG_GAMMA1_BLUE_OFFSET = 0xca,
+ /* VGA */
JBT_REG_BLANK_CONTROL = 0xcf,
JBT_REG_BLANK_TH_TV = 0xd0,
JBT_REG_CKV_ON_OFF = 0xd1,
@@ -77,6 +79,15 @@
JBT_REG_ASW_TIMING_1 = 0xd4,
JBT_REG_ASW_TIMING_2 = 0xd5,
+ /* QVGA */
+ JBT_REG_BLANK_CONTROL_QVGA = 0xd6,
+ JBT_REG_BLANK_TH_TV_QVGA = 0xd7,
+ JBT_REG_CKV_ON_OFF_QVGA = 0xd8,
+ JBT_REG_CKV_1_2_QVGA = 0xd9,
+ JBT_REG_OEV_TIMING_QVGA = 0xde,
+ JBT_REG_ASW_TIMING_1_QVGA = 0xdf,
+ JBT_REG_ASW_TIMING_2_QVGA = 0xe0,
+
JBT_REG_HCLOCK_VGA = 0xec,
JBT_REG_HCLOCK_QVGA = 0xed,
@@ -86,12 +97,14 @@
JBT_STATE_DEEP_STANDBY,
JBT_STATE_SLEEP,
JBT_STATE_NORMAL,
+ JBT_STATE_QVGA_NORMAL,
};
static const char *jbt_state_names[] = {
[JBT_STATE_DEEP_STANDBY] = "deep-standby",
[JBT_STATE_SLEEP] = "sleep",
[JBT_STATE_NORMAL] = "normal",
+ [JBT_STATE_QVGA_NORMAL] = "qvga-normal",
};
#if 1
@@ -155,7 +168,7 @@
return rc;
}
-static int jbt_init_regs(struct jbt_info *jbt)
+static int jbt_init_regs(struct jbt_info *jbt, int qvga)
{
int rc;
@@ -191,17 +204,33 @@
rc |= jbt_reg_write(jbt, JBT_REG_GAMMA1_BLUE_OFFSET, 0x00);
rc |= jbt_reg_write(jbt, JBT_REG_GAMMA1_BLUE_OFFSET, 0x00);
- rc |= jbt_reg_write16(jbt, JBT_REG_HCLOCK_VGA, 0x1f0);
- rc |= jbt_reg_write(jbt, JBT_REG_BLANK_CONTROL, 0x02);
- rc |= jbt_reg_write16(jbt, JBT_REG_BLANK_TH_TV, 0x0804);
- rc |= jbt_reg_write16(jbt, JBT_REG_BLANK_TH_TV, 0x0804);
-
- rc |= jbt_reg_write(jbt, JBT_REG_CKV_ON_OFF, 0x01);
- rc |= jbt_reg_write16(jbt, JBT_REG_CKV_1_2, 0x0000);
-
- rc |= jbt_reg_write16(jbt, JBT_REG_OEV_TIMING, 0x0d0e);
- rc |= jbt_reg_write16(jbt, JBT_REG_ASW_TIMING_1, 0x11a4);
- rc |= jbt_reg_write(jbt, JBT_REG_ASW_TIMING_2, 0x0e);
+ if (!qvga) {
+ DEBUGP("entering VGA mode\n");
+ rc |= jbt_reg_write16(jbt, JBT_REG_HCLOCK_VGA, 0x1f0);
+ rc |= jbt_reg_write(jbt, JBT_REG_BLANK_CONTROL, 0x02);
+ rc |= jbt_reg_write16(jbt, JBT_REG_BLANK_TH_TV, 0x0804);
+ rc |= jbt_reg_write16(jbt, JBT_REG_BLANK_TH_TV, 0x0804);
+
+ rc |= jbt_reg_write(jbt, JBT_REG_CKV_ON_OFF, 0x01);
+ rc |= jbt_reg_write16(jbt, JBT_REG_CKV_1_2, 0x0000);
+
+ rc |= jbt_reg_write16(jbt, JBT_REG_OEV_TIMING, 0x0d0e);
+ rc |= jbt_reg_write16(jbt, JBT_REG_ASW_TIMING_1, 0x11a4);
+ rc |= jbt_reg_write(jbt, JBT_REG_ASW_TIMING_2, 0x0e);
+ }
+ else {
+ DEBUGP("entering QVGA mode\n");
+ rc |= jbt_reg_write16(jbt, JBT_REG_HCLOCK_QVGA, 0x00ff);
+ rc |= jbt_reg_write(jbt, JBT_REG_BLANK_CONTROL_QVGA, 0x02);
+ rc |= jbt_reg_write16(jbt, JBT_REG_BLANK_TH_TV_QVGA, 0x0804);
+
+ rc |= jbt_reg_write(jbt, JBT_REG_CKV_ON_OFF_QVGA, 0x01);
+ rc |= jbt_reg_write16(jbt, JBT_REG_CKV_1_2_QVGA, 0x0008);
+
+ rc |= jbt_reg_write16(jbt, JBT_REG_OEV_TIMING_QVGA, 0x050a);
+ rc |= jbt_reg_write16(jbt, JBT_REG_ASW_TIMING_1_QVGA, 0x0a19);
+ rc |= jbt_reg_write(jbt, JBT_REG_ASW_TIMING_2_QVGA, 0x0a);
+ }
#if 0
rc |= jbt_reg_write16(jbt, JBT_REG_HCLOCK_QVGA, 0x00ff);
@@ -252,7 +281,32 @@
rc |= jbt_reg_write_nodata(jbt, JBT_REG_SLEEP_OUT);
/* initialize register set */
- rc |= jbt_init_regs(jbt);
+ rc |= jbt_init_regs(jbt, 0);
+ return rc;
+}
+
+static int sleep_to_qvga_normal(struct jbt_info *jbt)
+{
+ int rc;
+ DEBUGP("entering\n");
+
+ /* RGB I/F on, RAM wirte off, QVGA through, SIGCON enable */
+ rc = jbt_reg_write(jbt, JBT_REG_DISPLAY_MODE, 0x81);
+
+ /* Quad mode on */
+ rc |= jbt_reg_write(jbt, JBT_REG_QUAD_RATE, 0x22);
+
+ /* AVDD on, XVDD on */
+ rc |= jbt_reg_write(jbt, JBT_REG_POWER_ON_OFF, 0x16);
+
+ /* Output control */
+ rc |= jbt_reg_write16(jbt, JBT_REG_OUTPUT_CONTROL, 0xfff9);
+
+ /* Sleep mode off */
+ rc |= jbt_reg_write_nodata(jbt, JBT_REG_SLEEP_OUT);
+
+ /* initialize register set for qvga*/
+ rc |= jbt_init_regs(jbt, 1);
return rc;
}
@@ -296,6 +350,12 @@
/* then transition into normal */
rc |= sleep_to_normal(jbt);
break;
+ case JBT_STATE_QVGA_NORMAL:
+ /* first transition into sleep */
+ rc = standby_to_sleep(jbt);
+ /* then transition into normal */
+ rc |= sleep_to_qvga_normal(jbt);
+ break;
}
break;
case JBT_STATE_SLEEP:
@@ -309,6 +369,9 @@
case JBT_STATE_NORMAL:
rc = sleep_to_normal(jbt);
break;
+ case JBT_STATE_QVGA_NORMAL:
+ rc = sleep_to_qvga_normal(jbt);
+ break;
}
break;
case JBT_STATE_NORMAL:
@@ -325,6 +388,42 @@
case JBT_STATE_SLEEP:
rc = normal_to_sleep(jbt);
break;
+ case JBT_STATE_QVGA_NORMAL:
+ /* first transition into sleep */
+ rc = normal_to_sleep(jbt);
+ /* second transition into deep standby */
+ rc |= sleep_to_standby(jbt);
+ /* third transition into sleep */
+ rc |= standby_to_sleep(jbt);
+ /* fourth transition into normal */
+ rc |= sleep_to_qvga_normal(jbt);
+ break;
+ }
+ break;
+ case JBT_STATE_QVGA_NORMAL:
+ switch (new_state) {
+ case JBT_STATE_QVGA_NORMAL:
+ rc = 0;
+ break;
+ case JBT_STATE_DEEP_STANDBY:
+ /* first transition into sleep */
+ rc = normal_to_sleep(jbt);
+ /* then transition into deep standby */
+ rc |= sleep_to_standby(jbt);
+ break;
+ case JBT_STATE_SLEEP:
+ rc = normal_to_sleep(jbt);
+ break;
+ case JBT_STATE_NORMAL:
+ /* first transition into sleep */
+ rc = normal_to_sleep(jbt);
+ /* second transition into deep standby */
+ rc |= sleep_to_standby(jbt);
+ /* third transition into sleep */
+ rc |= standby_to_sleep(jbt);
+ /* fourth transition into normal */
+ rc |= sleep_to_normal(jbt);
+ break;
}
break;
}
@@ -367,7 +466,7 @@
strlen(jbt_state_names[i]))) {
DEBUGP("Switch to state: %i\n", i);
jbt6k74_enter_state(jbt, i);
- if (i == JBT_STATE_NORMAL)
+ if ((i == JBT_STATE_NORMAL)|(i == JBT_STATE_QVGA_NORMAL))
/* Enable display again after deep-standby */
jbt6k74_display_onoff(jbt, 1);
return count;
--
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