Return-path: Received: from server19320154104.serverpool.info ([193.201.54.104]:53477 "EHLO hauke-m.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750970Ab1GVXUr (ORCPT ); Fri, 22 Jul 2011 19:20:47 -0400 From: Hauke Mehrtens To: linville@tuxdriver.com, linux-wireless@vger.kernel.org, linux-mips@linux-mips.org Cc: jonas.gorski@gmail.com, ralf@linux-mips.org, zajec5@gmail.com, mb@bu3sch.de, george@znau.edu.ua, arend@broadcom.com, b43-dev@lists.infradead.org, bernhardloos@googlemail.com, arnd@arndb.de, julian.calaby@gmail.com, sshtylyov@mvista.com, Hauke Mehrtens Subject: [PATCH 06/11] bcma: add serial console support Date: Sat, 23 Jul 2011 01:20:10 +0200 Message-Id: <1311376815-15755-7-git-send-email-hauke@hauke-m.de> (sfid-20110723_012050_295213_CEBEA3FD) In-Reply-To: <1311376815-15755-1-git-send-email-hauke@hauke-m.de> References: <1311376815-15755-1-git-send-email-hauke@hauke-m.de> Sender: linux-wireless-owner@vger.kernel.org List-ID: This adds support for serial console to bcma, when operating on an SoC. Signed-off-by: Hauke Mehrtens --- drivers/bcma/bcma_private.h | 8 ++++ drivers/bcma/driver_chipcommon.c | 48 +++++++++++++++++++++++++++ drivers/bcma/driver_chipcommon_pmu.c | 26 ++++++++++++++ drivers/bcma/driver_mips.c | 1 + include/linux/bcma/bcma_driver_chipcommon.h | 14 ++++++++ 5 files changed, 97 insertions(+), 0 deletions(-) diff --git a/drivers/bcma/bcma_private.h b/drivers/bcma/bcma_private.h index b97633d..22d3052 100644 --- a/drivers/bcma/bcma_private.h +++ b/drivers/bcma/bcma_private.h @@ -29,6 +29,14 @@ 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 +void bcma_chipco_serial_init(struct bcma_drv_cc *cc); +#endif /* CONFIG_BCMA_DRIVER_MIPS */ + +/* driver_chipcommon_pmu.c */ +u32 bcma_pmu_alp_clock(struct bcma_drv_cc *cc); + #ifdef CONFIG_BCMA_HOST_PCI /* host_pci.c */ extern int __init bcma_host_pci_init(void); diff --git a/drivers/bcma/driver_chipcommon.c b/drivers/bcma/driver_chipcommon.c index 75f1ad7..12b42ea 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 */ diff --git a/drivers/bcma/driver_chipcommon_pmu.c b/drivers/bcma/driver_chipcommon_pmu.c index dd5846b..59d2b26 100644 --- a/drivers/bcma/driver_chipcommon_pmu.c +++ b/drivers/bcma/driver_chipcommon_pmu.c @@ -136,3 +136,29 @@ void bcma_pmu_init(struct bcma_drv_cc *cc) bcma_pmu_swreg_init(cc); bcma_pmu_workarounds(cc); } + +u32 bcma_pmu_alp_clock(struct bcma_drv_cc *cc) +{ + struct bcma_bus *bus = cc->core->bus; + + switch (bus->chipinfo.id) { + case 0x4716: + case 0x4748: + case 47162: + case 0x4313: + case 0x5357: + case 0x4749: + case 53572: + /* always 20Mhz */ + return 20000 * 1000; + case 0x5356: + case 0x5300: + /* always 25Mhz */ + return 25000 * 1000; + default: + pr_warn("No ALP clock specified for %04X device, " + "pmu rev. %d, using default %d Hz\n", + bus->chipinfo.id, cc->pmu.rev, BCMA_CC_PMU_ALP_CLOCK); + } + return BCMA_CC_PMU_ALP_CLOCK; +} diff --git a/drivers/bcma/driver_mips.c b/drivers/bcma/driver_mips.c index 4b60c9f9..b17233c 100644 --- a/drivers/bcma/driver_mips.c +++ b/drivers/bcma/driver_mips.c @@ -238,6 +238,7 @@ void bcma_core_mips_init(struct bcma_drv_mips *mcore) if (mcore->setup_done) return; + bcma_chipco_serial_init(&bus->drv_cc); bcma_core_mips_flash_detect(mcore); mcore->setup_done = true; } diff --git a/include/linux/bcma/bcma_driver_chipcommon.h b/include/linux/bcma/bcma_driver_chipcommon.h index 03cde8d..b9a930e 100644 --- a/include/linux/bcma/bcma_driver_chipcommon.h +++ b/include/linux/bcma/bcma_driver_chipcommon.h @@ -241,6 +241,9 @@ #define BCMA_CC_SPROM 0x0800 /* SPROM beginning */ #define BCMA_CC_SPROM_PCIE6 0x0830 /* SPROM beginning on PCIe rev >= 6 */ +/* ALP clock on pre-PMU chips */ +#define BCMA_CC_PMU_ALP_CLOCK 20000000 + /* Data for the PMU, if available. * Check availability with ((struct bcma_chipcommon)->capabilities & BCMA_CC_CAP_PMU) */ @@ -255,6 +258,14 @@ struct bcma_pflash { u32 window; u32 window_size; }; + +struct bcma_serial_port { + void *regs; + unsigned long clockspeed; + unsigned int irq; + unsigned int baud_base; + unsigned int reg_shift; +}; #endif /* CONFIG_BCMA_DRIVER_MIPS */ struct bcma_drv_cc { @@ -268,6 +279,9 @@ struct bcma_drv_cc { struct bcma_chipcommon_pmu pmu; #ifdef CONFIG_BCMA_DRIVER_MIPS struct bcma_pflash pflash; + + int nr_serial_ports; + struct bcma_serial_port serial_ports[4]; #endif /* CONFIG_BCMA_DRIVER_MIPS */ }; -- 1.7.4.1