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 * @brief   SGCN (Serengeti Console) keyboard port driver.
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 * @brief   SGCN (Serengeti Console) keyboard port driver.
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 */
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 */
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#include <as.h>
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#include <as.h>
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#include <ddi.h>
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#include <ddi.h>
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#include <ipc/ipc.h>
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#include <async.h>
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#include <async.h>
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#include <kbd.h>
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#include <kbd.h>
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#include <kbd_port.h>
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#include <kbd_port.h>
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#include <sysinfo.h>
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#include <sysinfo.h>
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#include <stdio.h>
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#include <stdio.h>
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#include <thread.h>
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#define POLL_INTERVAL       10000
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/**
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/**
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 * SGCN buffer header. It is placed at the very beginning of the SGCN
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 * SGCN buffer header. It is placed at the very beginning of the SGCN
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 * buffer.
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 * buffer.
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 */
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 */
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/**
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/**
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 * SGCN buffer offset within SGCN.
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 * SGCN buffer offset within SGCN.
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 */
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 */
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static uintptr_t sram_buffer_offset;
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static uintptr_t sram_buffer_offset;
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/* polling thread */
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static void sgcn_irq_handler(ipc_callid_t iid, ipc_call_t *call);
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static void *sgcn_thread_impl(void *arg);
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/**
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/**
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 * Initializes the SGCN driver.
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 * Initializes the SGCN driver.
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 * Maps the physical memory (SRAM) and registers the interrupt.
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 * Maps the physical memory (SRAM) and creates the polling thread.
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 */
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 */
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int kbd_port_init(void)
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int kbd_port_init(void)
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{
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{
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    async_set_interrupt_received(sgcn_irq_handler);
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    sram_virt_addr = (uintptr_t) as_get_mappable_page(sysinfo_value("sram.area.size"));
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    sram_virt_addr = (uintptr_t) as_get_mappable_page(sysinfo_value("sram.area.size"));
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    if (physmem_map((void *) sysinfo_value("sram.address.physical"),
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    if (physmem_map((void *) sysinfo_value("sram.address.physical"),
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        (void *) sram_virt_addr, sysinfo_value("sram.area.size") / PAGE_SIZE,
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        (void *) sram_virt_addr, sysinfo_value("sram.area.size") / PAGE_SIZE,
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        AS_AREA_READ | AS_AREA_WRITE) != 0) {
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        AS_AREA_READ | AS_AREA_WRITE) != 0) {
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        printf("SGCN: uspace driver could not map physical memory.");
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        printf("SGCN: uspace driver could not map physical memory.");
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        return -1;
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        return -1;
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    }
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    }
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    sram_buffer_offset = sysinfo_value("sram.buffer.offset");
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    sram_buffer_offset = sysinfo_value("sram.buffer.offset");
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    thread_id_t tid;
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    int rc;
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    ipc_register_irq(sysinfo_value("kbd.inr"), sysinfo_value("kbd.devno"),
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    rc = thread_create(sgcn_thread_impl, NULL, "kbd_poll", &tid);
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        0, (void *) 0);
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    if (rc != 0) {
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        return rc;
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    }
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    return 0;
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    return 0;
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}
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}
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/**
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/**
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 * Handler of the "key pressed" event. Reads codes of all the pressed keys from
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 * Handler of the "key pressed" event. Reads codes of all the pressed keys from
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 * the buffer.
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 * the buffer.
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 */
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 */
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static void sgcn_irq_handler(ipc_callid_t iid, ipc_call_t *call)
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static void sgcn_key_pressed(void)
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{
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{
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    char c;
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    char c;
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    uint32_t begin = SGCN_BUFFER_HEADER->in_begin;
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    uint32_t begin = SGCN_BUFFER_HEADER->in_begin;
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    uint32_t end = SGCN_BUFFER_HEADER->in_end;
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    uint32_t end = SGCN_BUFFER_HEADER->in_end;
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            SGCN_BUFFER(char, SGCN_BUFFER_HEADER->in_rdptr);
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            SGCN_BUFFER(char, SGCN_BUFFER_HEADER->in_rdptr);
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        kbd_push_scancode(c);
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        kbd_push_scancode(c);
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    }
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    }
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}
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}
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- 
 
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/**
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 * Thread to poll SGCN for keypresses.
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 */
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static void *sgcn_thread_impl(void *arg)
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{
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    (void) arg;
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    while (1) {
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        sgcn_key_pressed();
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        usleep(POLL_INTERVAL);
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    }
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}
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/** @}
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/** @}
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 */
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 */