c37904e8ba
and start teaching subsystems about it. The Atheros MIPS platforms don't guarantee any kind of FIFO consistency with interrupts in hardware. So software needs to do a flush when it receives an interrupt and before it calls the interrupt handler. There are new ones for the QCA934x and QCA955x, so do a few things: * Get rid of the individual ones (for ethernet and IP2); * Create a mux and enum listing all the variations on DDR flushes; * replace the uses of IP2 with the relevant one (which will typically be "PCI" here); * call the USB DDR flush before calling the real USB interrupt handlers; * call the ethernet one upon receiving an interrupt that's for us, rather than never calling it during operation. Tested: * QCA9558 (TP-Link archer c7 v2) * AR9331 (Carambola 2) TODO: * PCI, USB, ethernet, etc need to do a double-check to see if the interrupt was truely for them before doing the DDR. For now I prefer "correct" over "fast".
247 lines
5.7 KiB
C
247 lines
5.7 KiB
C
/*-
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* Copyright (c) 2010 Adrian Chadd
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_ddb.h"
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#include <sys/param.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/cons.h>
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#include <sys/kdb.h>
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#include <sys/reboot.h>
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#include <vm/vm.h>
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#include <vm/vm_page.h>
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#include <net/ethernet.h>
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#include <machine/clock.h>
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#include <machine/cpu.h>
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#include <machine/cpuregs.h>
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#include <machine/hwfunc.h>
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#include <machine/md_var.h>
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#include <machine/trap.h>
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#include <machine/vmparam.h>
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#include <mips/atheros/ar71xxreg.h>
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#include <mips/atheros/ar724xreg.h>
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#include <mips/atheros/ar71xx_cpudef.h>
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#include <mips/atheros/ar71xx_setup.h>
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#include <mips/atheros/ar71xx_chip.h>
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#include <mips/atheros/ar724x_chip.h>
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#include <mips/sentry5/s5reg.h>
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static void
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ar724x_chip_detect_mem_size(void)
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{
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}
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static void
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ar724x_chip_detect_sys_frequency(void)
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{
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uint32_t pll;
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uint32_t freq;
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uint32_t div;
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u_ar71xx_mdio_freq = u_ar71xx_refclk = AR724X_BASE_FREQ;
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pll = ATH_READ_REG(AR724X_PLL_REG_CPU_CONFIG);
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div = ((pll >> AR724X_PLL_DIV_SHIFT) & AR724X_PLL_DIV_MASK);
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freq = div * AR724X_BASE_FREQ;
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div = ((pll >> AR724X_PLL_REF_DIV_SHIFT) & AR724X_PLL_REF_DIV_MASK);
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freq *= div;
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u_ar71xx_cpu_freq = freq;
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div = ((pll >> AR724X_DDR_DIV_SHIFT) & AR724X_DDR_DIV_MASK) + 1;
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u_ar71xx_ddr_freq = freq / div;
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div = (((pll >> AR724X_AHB_DIV_SHIFT) & AR724X_AHB_DIV_MASK) + 1) * 2;
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u_ar71xx_ahb_freq = u_ar71xx_cpu_freq / div;
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u_ar71xx_wdt_freq = u_ar71xx_cpu_freq / div;
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u_ar71xx_uart_freq = u_ar71xx_cpu_freq / div;
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}
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static void
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ar724x_chip_device_stop(uint32_t mask)
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{
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uint32_t mask_inv, reg;
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mask_inv = mask & AR724X_RESET_MODULE_USB_OHCI_DLL;
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reg = ATH_READ_REG(AR724X_RESET_REG_RESET_MODULE);
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reg |= mask;
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reg &= ~mask_inv;
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ATH_WRITE_REG(AR724X_RESET_REG_RESET_MODULE, reg);
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}
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static void
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ar724x_chip_device_start(uint32_t mask)
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{
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uint32_t mask_inv, reg;
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mask_inv = mask & AR724X_RESET_MODULE_USB_OHCI_DLL;
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reg = ATH_READ_REG(AR724X_RESET_REG_RESET_MODULE);
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reg &= ~mask;
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reg |= mask_inv;
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ATH_WRITE_REG(AR724X_RESET_REG_RESET_MODULE, reg);
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}
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static int
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ar724x_chip_device_stopped(uint32_t mask)
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{
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uint32_t reg;
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reg = ATH_READ_REG(AR724X_RESET_REG_RESET_MODULE);
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return ((reg & mask) == mask);
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}
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static void
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ar724x_chip_set_mii_speed(uint32_t unit, uint32_t speed)
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{
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/* XXX TODO */
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return;
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}
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/*
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* XXX TODO: set the PLL for arge0 only on AR7242.
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* The PLL/clock requirements are different.
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*
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* Otherwise, it's a NULL function for AR7240, AR7241 and
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* AR7242 arge1.
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*/
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static void
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ar724x_chip_set_pll_ge(int unit, int speed, uint32_t pll)
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{
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switch (unit) {
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case 0:
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/* XXX TODO */
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break;
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case 1:
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/* XXX TODO */
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break;
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default:
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printf("%s: invalid PLL set for arge unit: %d\n",
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__func__, unit);
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return;
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}
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}
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static void
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ar724x_chip_ddr_flush(ar71xx_flush_ddr_id_t id)
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{
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switch (id) {
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case AR71XX_CPU_DDR_FLUSH_GE0:
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ar71xx_ddr_flush(AR724X_DDR_REG_FLUSH_GE0);
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break;
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case AR71XX_CPU_DDR_FLUSH_GE1:
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ar71xx_ddr_flush(AR724X_DDR_REG_FLUSH_GE1);
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break;
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case AR71XX_CPU_DDR_FLUSH_USB:
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ar71xx_ddr_flush(AR724X_DDR_REG_FLUSH_USB);
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break;
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case AR71XX_CPU_DDR_FLUSH_PCIE:
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ar71xx_ddr_flush(AR724X_DDR_REG_FLUSH_PCIE);
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break;
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default:
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printf("%s: invalid DDR flush id (%d)\n", __func__, id);
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break;
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}
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}
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static uint32_t
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ar724x_chip_get_eth_pll(unsigned int mac, int speed)
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{
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return (0);
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}
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static void
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ar724x_chip_init_usb_peripheral(void)
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{
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switch (ar71xx_soc) {
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case AR71XX_SOC_AR7240:
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ar71xx_device_stop(AR724X_RESET_MODULE_USB_OHCI_DLL |
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AR724X_RESET_USB_HOST);
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DELAY(1000);
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ar71xx_device_start(AR724X_RESET_MODULE_USB_OHCI_DLL |
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AR724X_RESET_USB_HOST);
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DELAY(1000);
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/*
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* WAR for HW bug. Here it adjusts the duration
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* between two SOFS.
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*/
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ATH_WRITE_REG(AR71XX_USB_CTRL_FLADJ,
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(3 << USB_CTRL_FLADJ_A0_SHIFT));
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break;
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case AR71XX_SOC_AR7241:
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case AR71XX_SOC_AR7242:
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ar71xx_device_start(AR724X_RESET_MODULE_USB_OHCI_DLL);
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DELAY(100);
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ar71xx_device_start(AR724X_RESET_USB_HOST);
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DELAY(100);
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ar71xx_device_start(AR724X_RESET_USB_PHY);
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DELAY(100);
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break;
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default:
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break;
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}
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}
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struct ar71xx_cpu_def ar724x_chip_def = {
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&ar724x_chip_detect_mem_size,
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&ar724x_chip_detect_sys_frequency,
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&ar724x_chip_device_stop,
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&ar724x_chip_device_start,
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&ar724x_chip_device_stopped,
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&ar724x_chip_set_pll_ge,
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&ar724x_chip_set_mii_speed,
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&ar71xx_chip_set_mii_if,
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&ar724x_chip_get_eth_pll,
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&ar724x_chip_ddr_flush,
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&ar724x_chip_init_usb_peripheral
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};
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