mirror of
git://git.openwrt.org/openwrt/openwrt.git
synced 2025-11-03 22:44:27 -05:00
152 lines
4.3 KiB
Diff
152 lines
4.3 KiB
Diff
From b7c100827012ba588089807475affe0c69a3f817 Mon Sep 17 00:00:00 2001
|
|
From: Hauke Mehrtens <hauke@hauke-m.de>
|
|
Date: Mon, 6 Jun 2011 00:07:33 +0200
|
|
Subject: [PATCH 06/14] bcma: add serial console support
|
|
|
|
This adds support for serial console to bcma, when operating on an
|
|
embedded device.
|
|
|
|
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
|
|
---
|
|
drivers/bcma/bcma_private.h | 6 +++
|
|
drivers/bcma/driver_chipcommon.c | 64 +++++++++++++++++++++++++++++++++
|
|
drivers/bcma/driver_mips.c | 9 +++++
|
|
include/linux/bcma/bcma_driver_mips.h | 11 ++++++
|
|
4 files changed, 90 insertions(+), 0 deletions(-)
|
|
|
|
--- a/drivers/bcma/bcma_private.h
|
|
+++ b/drivers/bcma/bcma_private.h
|
|
@@ -29,6 +29,12 @@ void bcma_init_bus(struct bcma_bus *bus)
|
|
/* sprom.c */
|
|
int bcma_sprom_get(struct bcma_bus *bus);
|
|
|
|
+/* driver_chipcommon.c */
|
|
+#ifdef CONFIG_BCMA_DRIVER_MIPS
|
|
+extern int bcma_chipco_serial_init(struct bcma_drv_cc *cc,
|
|
+ struct bcma_drv_mips_serial_port *ports);
|
|
+#endif /* CONFIG_BCMA_DRIVER_MIPS */
|
|
+
|
|
#ifdef CONFIG_BCMA_HOST_PCI
|
|
/* host_pci.c */
|
|
extern int __init bcma_host_pci_init(void);
|
|
--- a/drivers/bcma/driver_chipcommon.c
|
|
+++ b/drivers/bcma/driver_chipcommon.c
|
|
@@ -92,3 +92,67 @@ u32 bcma_chipco_gpio_polarity(struct bcm
|
|
{
|
|
return bcma_cc_write32_masked(cc, BCMA_CC_GPIOPOL, mask, value);
|
|
}
|
|
+
|
|
+#ifdef CONFIG_BCMA_DRIVER_MIPS
|
|
+int bcma_chipco_serial_init(struct bcma_drv_cc *cc,
|
|
+ struct bcma_drv_mips_serial_port *ports)
|
|
+{
|
|
+ int nr_ports = 0;
|
|
+ u32 plltype;
|
|
+ unsigned int irq;
|
|
+ u32 baud_base, div;
|
|
+ u32 i, n;
|
|
+ unsigned int ccrev = cc->core->id.rev;
|
|
+
|
|
+ plltype = (cc->capabilities & BCMA_CC_CAP_PLLT);
|
|
+ irq = bcma_core_mips_irq(cc->core);
|
|
+
|
|
+ if ((ccrev >= 11) && (ccrev != 15) && (ccrev != 20)) {
|
|
+ /* Fixed ALP clock */
|
|
+ baud_base = 20000000;
|
|
+ if (cc->capabilities & BCMA_CC_CAP_PMU) {
|
|
+ /* FIXME: baud_base is different for devices with a PMU */
|
|
+ WARN_ON(1);
|
|
+ }
|
|
+ div = 1;
|
|
+ if (ccrev >= 21) {
|
|
+ /* Turn off UART clock before switching clocksource. */
|
|
+ bcma_cc_write32(cc, BCMA_CC_CORECTL,
|
|
+ bcma_cc_read32(cc, BCMA_CC_CORECTL)
|
|
+ & ~BCMA_CC_CORECTL_UARTCLKEN);
|
|
+ }
|
|
+ /* Set the override bit so we don't divide it */
|
|
+ bcma_cc_write32(cc, BCMA_CC_CORECTL,
|
|
+ bcma_cc_read32(cc, BCMA_CC_CORECTL)
|
|
+ | BCMA_CC_CORECTL_UARTCLK0);
|
|
+ if (ccrev >= 21) {
|
|
+ /* Re-enable the UART clock. */
|
|
+ bcma_cc_write32(cc, BCMA_CC_CORECTL,
|
|
+ bcma_cc_read32(cc, BCMA_CC_CORECTL)
|
|
+ | BCMA_CC_CORECTL_UARTCLKEN);
|
|
+ }
|
|
+ } else
|
|
+ pr_err("serial not supported on this device ccrev: 0x%x\n",
|
|
+ ccrev);
|
|
+
|
|
+ /* Determine the registers of the UARTs */
|
|
+ n = (cc->capabilities & BCMA_CC_CAP_NRUART);
|
|
+ for (i = 0; i < n; i++) {
|
|
+ void __iomem *cc_mmio;
|
|
+ void __iomem *uart_regs;
|
|
+
|
|
+ cc_mmio = cc->core->bus->mmio +
|
|
+ (cc->core->core_index * BCMA_CORE_SIZE);
|
|
+ uart_regs = cc_mmio + BCMA_CC_UART0_DATA;
|
|
+ uart_regs += (i * 256);
|
|
+
|
|
+ nr_ports++;
|
|
+ ports[i].regs = uart_regs;
|
|
+ ports[i].irq = irq;
|
|
+ ports[i].baud_base = baud_base;
|
|
+ ports[i].reg_shift = 0;
|
|
+ }
|
|
+
|
|
+ return nr_ports;
|
|
+}
|
|
+#endif /* CONFIG_BCMA_DRIVER_MIPS */
|
|
--- a/drivers/bcma/driver_mips.c
|
|
+++ b/drivers/bcma/driver_mips.c
|
|
@@ -157,6 +157,14 @@ static void bcma_core_mips_dump_irq(stru
|
|
}
|
|
}
|
|
|
|
+static void bcma_core_mips_serial_init(struct bcma_drv_mips *mcore)
|
|
+{
|
|
+ struct bcma_bus *bus = mcore->core->bus;
|
|
+
|
|
+ mcore->nr_serial_ports = bcma_chipco_serial_init(&bus->drv_cc,
|
|
+ mcore->serial_ports);
|
|
+}
|
|
+
|
|
static void bcma_core_mips_flash_detect(struct bcma_drv_mips *mcore)
|
|
{
|
|
struct bcma_bus *bus = mcore->core->bus;
|
|
@@ -229,6 +237,7 @@ void bcma_core_mips_init(struct bcma_drv
|
|
if (mcore->setup_done)
|
|
return;
|
|
|
|
+ bcma_core_mips_serial_init(mcore);
|
|
bcma_core_mips_flash_detect(mcore);
|
|
mcore->setup_done = true;
|
|
}
|
|
--- a/include/linux/bcma/bcma_driver_mips.h
|
|
+++ b/include/linux/bcma/bcma_driver_mips.h
|
|
@@ -32,11 +32,22 @@
|
|
|
|
struct bcma_device;
|
|
|
|
+struct bcma_drv_mips_serial_port {
|
|
+ void *regs;
|
|
+ unsigned long clockspeed;
|
|
+ unsigned int irq;
|
|
+ unsigned int baud_base;
|
|
+ unsigned int reg_shift;
|
|
+};
|
|
+
|
|
struct bcma_drv_mips {
|
|
struct bcma_device *core;
|
|
u8 setup_done:1;
|
|
unsigned int assigned_irqs;
|
|
|
|
+ int nr_serial_ports;
|
|
+ struct bcma_drv_mips_serial_port serial_ports[4];
|
|
+
|
|
u8 flash_buswidth;
|
|
u32 flash_window;
|
|
u32 flash_window_size;
|