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authorHauke Mehrtens <hauke@hauke-m.de>2011-07-23 01:20:10 +0200
committerJohn W. Linville <linville@tuxdriver.com>2011-08-08 14:29:28 -0400
commite3afe0e5be7576ac1282ea9fbbc9b352bb379227 (patch)
tree0b74e8bd5e45b2d50f9fa2033674a00aeac5f6ae /drivers/bcma/driver_chipcommon.c
parent21e0534ad7415559bb8dee0dc00e39646fed83c9 (diff)
downloadop-kernel-dev-e3afe0e5be7576ac1282ea9fbbc9b352bb379227.zip
op-kernel-dev-e3afe0e5be7576ac1282ea9fbbc9b352bb379227.tar.gz
bcma: add serial console support
This adds support for serial console to bcma, when operating on an SoC. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/bcma/driver_chipcommon.c')
-rw-r--r--drivers/bcma/driver_chipcommon.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/drivers/bcma/driver_chipcommon.c b/drivers/bcma/driver_chipcommon.c
index acca327..47cce9d 100644
--- a/drivers/bcma/driver_chipcommon.c
+++ b/drivers/bcma/driver_chipcommon.c
@@ -106,3 +106,51 @@ u32 bcma_chipco_gpio_polarity(struct bcma_drv_cc *cc, u32 mask, u32 value)
{
return bcma_cc_write32_masked(cc, BCMA_CC_GPIOPOL, mask, value);
}
+
+#ifdef CONFIG_BCMA_DRIVER_MIPS
+void bcma_chipco_serial_init(struct bcma_drv_cc *cc)
+{
+ unsigned int irq;
+ u32 baud_base;
+ u32 i;
+ unsigned int ccrev = cc->core->id.rev;
+ struct bcma_serial_port *ports = cc->serial_ports;
+
+ if (ccrev >= 11 && ccrev != 15) {
+ /* Fixed ALP clock */
+ baud_base = bcma_pmu_alp_clock(cc);
+ 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);
+ return;
+ }
+
+ irq = bcma_core_mips_irq(cc->core);
+
+ /* Determine the registers of the UARTs */
+ cc->nr_serial_ports = (cc->capabilities & BCMA_CC_CAP_NRUART);
+ for (i = 0; i < cc->nr_serial_ports; i++) {
+ ports[i].regs = cc->core->io_addr + BCMA_CC_UART0_DATA +
+ (i * 256);
+ ports[i].irq = irq;
+ ports[i].baud_base = baud_base;
+ ports[i].reg_shift = 0;
+ }
+}
+#endif /* CONFIG_BCMA_DRIVER_MIPS */
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