first round name simplification. drop the <component>_ prefix.

the prefix was introduced in the early v2 tree many years ago
because our old build system "newconfig" could not handle two files with
the same name in different paths like /path/to/usb.c and
/another/path/to/usb.c correctly. Only one of the files would end up
being compiled into the final image.

Since Kconfig (actually since shortly before we switched to Kconfig) we
don't suffer from that problem anymore. So we could drop the sb700_
prefix from all those filenames (or, the <componentname>_ prefix in general)

- makes it easier to fork off a new chipset
- makes it easier to diff against other chipsets
- storing redundant information in filenames seems wrong

Signed-off-by: <stepan@coresystems.de>

Acked-by: Patrick Georgi <patrick@georgi-clan.de>
Acked-by: Peter Stuge <peter@stuge.se>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6149 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 275 insertions, 0 deletions

diff --git a/src/southbridge/amd/cs5536/early_setup.c b/src/southbridge/amd/cs5536/early_setup.c
new file mode 100644
index 0000000000..047c1a21a0
--- /dev/null
+++ b/src/southbridge/amd/cs5536/early_setup.c
@@ -0,0 +1,275 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2007 Advanced Micro Devices, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+/*
+ * cs5536_early_setup.c:	Early chipset initialization for CS5536 companion device
+ *	This file implements the initialization sequence documented in section 4.2 of
+ *	AMD Geode GX Processor CS5536 Companion Device GoedeROM Porting Guide.
+ */
+
+/**
+ * @brief Setup PCI IDSEL for CS5536
+ */
+static void cs5536_setup_extmsr(void)
+{
+	msr_t msr;
+
+	/* forward MSR access to CS5536_GLINK_PORT_NUM to CS5536_DEV_NUM */
+	msr.hi = msr.lo = 0x00000000;
+#if CS5536_GLINK_PORT_NUM <= 4
+	msr.lo = CS5536_DEV_NUM << (unsigned char)((CS5536_GLINK_PORT_NUM - 1) * 8);
+#else
+	msr.hi = CS5536_DEV_NUM << (unsigned char)((CS5536_GLINK_PORT_NUM - 5) * 8);
+#endif
+	wrmsr(GLPCI_ExtMSR, msr);
+}
+
+static void cs5536_setup_idsel(void)
+{
+	/* write IDSEL to the write once register at address 0x0000 */
+	outl(0x1 << (CS5536_DEV_NUM + 10), 0);
+}
+
+static void cs5536_usb_swapsif(void)
+{
+	msr_t msr;
+
+	msr = rdmsr(USB1_SB_GLD_MSR_CAP + 0x5);
+	//USB Serial short detect bit.
+	if (msr.hi & 0x10) {
+		/* We need to preserve bits 32,33,35 and not clear any BIST
+		 * error, but clear the SERSHRT error bit */
+
+		msr.hi &= 0xFFFFFFFB;
+		wrmsr(USB1_SB_GLD_MSR_CAP + 0x5, msr);
+	}
+}
+
+static void cs5536_setup_iobase(void)
+{
+	msr_t msr;
+	/* setup LBAR for SMBus controller */
+	msr.hi = 0x0000f001;
+	msr.lo = SMBUS_IO_BASE;
+	wrmsr(MDD_LBAR_SMB, msr);
+
+	/* setup LBAR for GPIO */
+	msr.hi = 0x0000f001;
+	msr.lo = GPIO_IO_BASE;
+	wrmsr(MDD_LBAR_GPIO, msr);
+
+	/* setup LBAR for MFGPT */
+	msr.hi = 0x0000f001;
+	msr.lo = MFGPT_IO_BASE;
+	wrmsr(MDD_LBAR_MFGPT, msr);
+
+	/* setup LBAR for ACPI */
+	msr.hi = 0x0000f001;
+	msr.lo = ACPI_IO_BASE;
+	wrmsr(MDD_LBAR_ACPI, msr);
+
+	/* setup LBAR for PM Support */
+	msr.hi = 0x0000f001;
+	msr.lo = PMS_IO_BASE;
+	wrmsr(MDD_LBAR_PMS, msr);
+}
+
+static void cs5536_setup_power_button(void)
+{
+#if CONFIG_ENABLE_POWER_BUTTON
+	outl(0x40020000, PMS_IO_BASE + 0x40);
+#endif
+
+	/* setup WORK_AUX/GPIO24, it is the external signal for 5536
+	 * vsb_work_aux controls all voltage rails except Vstandby & Vmem.
+	 * We need to enable, OUT_AUX1 and OUTPUT_ENABLE in this order.
+	 * If WORK_AUX/GPIO24 is not enabled then soft-off will not work.
+	 */
+	outl(GPIOH_24_SET, GPIO_IO_BASE + GPIOH_OUT_AUX1_SELECT);
+	outl(GPIOH_24_SET, GPIO_IO_BASE + GPIOH_OUTPUT_ENABLE);
+
+}
+
+static void cs5536_setup_gpio(void)
+{
+	uint32_t val;
+
+	/* setup GPIO pins 14/15 for SDA/SCL */
+	val = GPIOL_15_SET | GPIOL_14_SET;
+	/* Output Enable */
+	outl(val, GPIO_IO_BASE + GPIOL_OUT_AUX1_SELECT);
+	/* Output AUX1 */
+	outl(val, GPIO_IO_BASE + GPIOL_OUTPUT_ENABLE);
+	/* Input Enable */
+	outl(val, GPIO_IO_BASE + GPIOL_IN_AUX1_SELECT);
+	/* Input AUX1 */
+	outl(val, GPIO_IO_BASE + GPIOL_INPUT_ENABLE);
+}
+
+void cs5536_disable_internal_uart(void)
+{
+	msr_t msr;
+	/* The UARTs default to enabled.
+	 * Disable and reset them and configure them later. (SIO init)
+	 */
+	msr = rdmsr(MDD_UART1_CONF);
+	msr.lo = 1;		// reset
+	wrmsr(MDD_UART1_CONF, msr);
+	msr.lo = 0;		// disabled
+	wrmsr(MDD_UART1_CONF, msr);
+
+	msr = rdmsr(MDD_UART2_CONF);
+	msr.lo = 1;		// reset
+	wrmsr(MDD_UART2_CONF, msr);
+	msr.lo = 0;		// disabled
+	wrmsr(MDD_UART2_CONF, msr);
+}
+
+static void cs5536_setup_cis_mode(void)
+{
+	msr_t msr;
+
+	/* setup CPU interface serial to mode B to match CPU */
+	msr = rdmsr(GLPCI_SB_CTRL);
+	msr.lo &= ~0x18;
+	msr.lo |= 0x10;
+	wrmsr(GLPCI_SB_CTRL, msr);
+}
+
+/**
+ * Enable the on-chip UART.
+ *
+ * See page 412 of the AMD Geode CS5536 Companion Device data book.
+ */
+static void cs5536_setup_onchipuart1(void)
+{
+	msr_t msr;
+
+	/* Setup early for polling only mode.
+	 * 1. Enable GPIO 8 to OUT_AUX1, 9 to IN_AUX1.
+	 *        GPIO LBAR + 0x04, LBAR + 0x10, LBAR + 0x20, LBAR + 34
+	 * 2. Enable UART I/O space in MDD.
+	 *        MSR 0x51400014 bit 18:16
+	 * 3. Enable UART controller.
+	 *        MSR 0x5140003A bit 0, 1
+	 */
+
+	/* GPIO8 - UART1_TX */
+	/* Set: Output Enable (0x4) */
+	outl(GPIOL_8_SET, GPIO_IO_BASE + GPIOL_OUTPUT_ENABLE);
+	/* Set: OUTAUX1 Select (0x10) */
+	outl(GPIOL_8_SET, GPIO_IO_BASE + GPIOL_OUT_AUX1_SELECT);
+
+	/* GPIO9 - UART1_RX */
+	/* Set: Input Enable (0x20) */
+	outl(GPIOL_9_SET, GPIO_IO_BASE + GPIOL_INPUT_ENABLE);
+	/* Set: INAUX1 Select (0x34) */
+	outl(GPIOL_9_SET, GPIO_IO_BASE + GPIOL_IN_AUX1_SELECT);
+
+	/* Set address to 0x3F8. */
+	msr = rdmsr(MDD_LEG_IO);
+	msr.lo |= 0x7 << 16;
+	wrmsr(MDD_LEG_IO, msr);
+
+	/* Bit 1 = DEVEN (device enable)
+	 * Bit 4 = EN_BANKS (allow access to the upper banks)
+	 */
+	msr.lo = (1 << 4) | (1 << 1);
+	msr.hi = 0;
+
+	/* Enable COM1. */
+	wrmsr(MDD_UART1_CONF, msr);
+}
+
+static void cs5536_setup_onchipuart2(void)
+{
+	msr_t msr;
+
+	/* GPIO4 - UART2_TX */
+	/* Set: Output Enable  (0x4) */
+	outl(GPIOL_4_SET, GPIO_IO_BASE + GPIOL_OUTPUT_ENABLE);
+	/* Set: OUTAUX1 Select (0x10) */
+	outl(GPIOL_4_SET, GPIO_IO_BASE + GPIOL_OUT_AUX1_SELECT);
+	/* GPIO4 - UART2_RX */
+	/* Set: Input Enable   (0x20) */
+	outl(GPIOL_3_SET, GPIO_IO_BASE + GPIOL_INPUT_ENABLE);
+	/* Set: INAUX1 Select  (0x34) */
+	outl(GPIOL_3_SET, GPIO_IO_BASE + GPIOL_IN_AUX1_SELECT);
+
+	/* Set: GPIO 3 + 3 Pull Up  (0x18) */
+	outl(GPIOL_3_SET | GPIOL_4_SET,
+	     GPIO_IO_BASE + GPIOL_PULLUP_ENABLE);
+
+	/* set address to 2F8 */
+	msr = rdmsr(MDD_LEG_IO);
+	msr.lo |= 0x5 << 20;
+	wrmsr(MDD_LEG_IO, msr);
+
+	/* Bit 1 = DEVEN (device enable)
+	 * Bit 4 = EN_BANKS (allow access to the upper banks
+	 */
+	msr.lo = (1 << 4) | (1 << 1);
+	msr.hi = 0;
+
+	/* enable COM2 */
+	wrmsr(MDD_UART2_CONF, msr);
+}
+
+void cs5536_setup_onchipuart(int uart)
+{
+	switch (uart) {
+	case 1:
+		cs5536_setup_onchipuart1();
+		break;
+	case 2:
+		cs5536_setup_onchipuart2();
+		break;
+	}
+}
+
+
+/* note: you can't do prints in here in most cases,
+ * and we don't want to hang on serial, so they are
+ * commented out
+ */
+static void cs5536_early_setup(void)
+{
+	msr_t msr;
+
+	cs5536_setup_extmsr();
+	cs5536_setup_cis_mode();
+
+	msr = rdmsr(GLCP_SYS_RSTPLL);
+	if (msr.lo & (0x3f << 26)) {
+		/* PLL is already set and we are reboot from PLL reset */
+		//print_debug("reboot from BIOS reset\n");
+		return;
+	}
+	//print_debug("Setup idsel\n");
+	cs5536_setup_idsel();
+	//print_debug("Setup iobase\n");
+	cs5536_usb_swapsif();
+	cs5536_setup_iobase();
+	//print_debug("Setup gpio\n");
+	cs5536_setup_gpio();
+	//print_debug("Setup smbus\n");
+	cs5536_enable_smbus();
+	//print_debug("Setup power button\n");
+	cs5536_setup_power_button();
+}