/* SPDX-License-Identifier: GPL-2.0-only */ #include <console/console.h> #include <device/device.h> #include <device/pnp.h> #include <arch/io.h> #include <delay.h> #include <pc80/keyboard.h> #include "ec.h" #include "chip.h" /* kbc helper functions from drivers/pc80/keyboard.c. TODO: share functions. */ static int kbc_input_buffer_empty(void) { u32 timeout; for (timeout = KBC_TIMEOUT_IN_MS; timeout && (inb(KBD_STATUS) & KBD_IBF); timeout--) { mdelay(1); } if (!timeout) { printk(BIOS_WARNING, "Unexpected Keyboard controller input buffer full\n"); } return !!timeout; } static int kbc_output_buffer_full(void) { u32 timeout; for (timeout = KBC_TIMEOUT_IN_MS; timeout && ((inb(KBD_STATUS) & KBD_OBF) == 0); timeout--) { mdelay(1); } if (!timeout) { printk(BIOS_INFO, "Keyboard controller output buffer result timeout\n"); } return !!timeout; } int kbc_cleanup_buffers(void) { u32 timeout; for (timeout = KBC_TIMEOUT_IN_MS; timeout && (inb(KBD_STATUS) & (KBD_OBF | KBD_IBF)); timeout--) { mdelay(1); inb(KBD_DATA); } if (!timeout) { printk(BIOS_ERR, "Couldn't cleanup the keyboard controller buffers\n"); printk(BIOS_ERR, "Status (0x%x): 0x%x, Buffer (0x%x): 0x%x\n", KBD_STATUS, inb(KBD_STATUS), KBD_DATA, inb(KBD_DATA)); } return !!timeout; } /* The ENE 60/64 EC registers are the same command/status IB/OB KBC pair. * Check status from 64 port before each command. * * Ex. Get panel ID command C43/D77 * Check IBF empty. Then Write 0x43(CMD) to 0x64 Port * Check IBF empty. Then Write 0x77(DATA) to 0x60 Port * Check OBF set. Then Get Data(0x03:panel ID) from 0x60 * Different commands return may or may not respond and may have multiple * bytes. Keep it simple for nor */ u8 ec_kbc_read_ob(void) { if (!kbc_output_buffer_full()) return 0; return inb(KBD_DATA); } void ec_kbc_write_cmd(u8 cmd) { if (!kbc_input_buffer_empty()) return; outb(cmd, KBD_COMMAND); } void ec_kbc_write_ib(u8 data) { if (!kbc_input_buffer_empty()) return; outb(data, KBD_DATA); } /* * These functions are for accessing the ENE932 device space, but are not * currently used. */ /* static u8 ec_io_read(u16 addr) { outb(addr >> 8, EC_IO_HIGH); outb(addr & 0xff, EC_IO_LOW); return inb(EC_IO_DATA); } */ /*static void ec_write(u16 addr, u8 data) { outb(addr >> 8, EC_IO_HIGH); outb(addr & 0xff, EC_IO_LOW; outb(data, EC_IO_DATA); } */ static void ene932_init(struct device *dev) { if (!dev->enabled) return; printk(BIOS_DEBUG, "Compal ENE932: Initializing keyboard.\n"); pc_keyboard_init(NO_AUX_DEVICE); } static struct device_operations ops = { .init = ene932_init, .read_resources = noop_read_resources, .set_resources = noop_set_resources, }; static struct pnp_info pnp_dev_info[] = { { NULL, 0, 0, 0, } }; static void enable_dev(struct device *dev) { pnp_enable_devices(dev, &ops, ARRAY_SIZE(pnp_dev_info), pnp_dev_info); } struct chip_operations ec_compal_ene932_ops = { .name = "COMPAL ENE932 EC", .enable_dev = enable_dev };