| 34,6 → 34,7 |
|---|
| * @brief SGCN driver. |
| */ |
| |
| #include <arch.h> |
| #include <arch/drivers/sgcn.h> |
| #include <arch/drivers/kbd.h> |
| #include <genarch/ofw/ofw_tree.h> |
| 41,15 → 42,14 |
|---|
| #include <string.h> |
| #include <print.h> |
| #include <mm/page.h> |
| #include <ipc/irq.h> |
| #include <ddi/ddi.h> |
| #include <ddi/device.h> |
| #include <proc/thread.h> |
| #include <console/chardev.h> |
| #include <console/console.h> |
| #include <ddi/device.h> |
| #include <sysinfo/sysinfo.h> |
| #include <synch/spinlock.h> |
| |
| #define POLL_INTERVAL 10000 |
| |
| /* |
| * Physical address at which the SBBC starts. This value has been obtained |
| * by inspecting (using Simics) memory accesses made by OBP. It is valid |
| 73,7 → 73,7 |
|---|
| * that the OBP console buffer is not the only console buffer |
| * which can be used. It is, however, used because when the kernel |
| * is running, the OBP buffer is not used by OBP any more but OBP |
| * has already made neccessary arangements so that the output will |
| * has already made necessary arrangements so that the output will |
| * be read from the OBP buffer and input will go to the OBP buffer. |
| * Therefore HelenOS needs to make no such arrangements any more. |
| */ |
| 82,16 → 82,6 |
|---|
| /* magic string contained at the beginning of the console buffer */ |
| #define SGCN_BUFFER_MAGIC "CON" |
| |
| /** |
| * The driver is polling based, but in order to notify the userspace |
| * of a key being pressed, we need to supply the interface with some |
| * interrupt number. The interrupt number can be arbitrary as it it |
| * will never be used for identifying HW interrupts, but only in |
| * notifying the userspace. |
| */ |
| #define FICTIONAL_INR 1 |
| |
| |
| /* |
| * Returns a pointer to the object of a given type which is placed at the given |
| * offset from the SRAM beginning. |
| 106,7 → 96,7 |
|---|
| * offset from the console buffer beginning. |
| */ |
| #define SGCN_BUFFER(type, offset) \ |
| ((type *) (sgcn_buffer_begin + (offset))) |
| ((type *) (sgcn_buffer_begin + (offset))) |
| |
| /** Returns a pointer to the console buffer header. */ |
| #define SGCN_BUFFER_HEADER (SGCN_BUFFER(sgcn_buffer_header_t, 0)) |
| 123,14 → 113,9 |
|---|
| */ |
| static uintptr_t sgcn_buffer_begin; |
| |
| /** |
| * SGCN IRQ structure. So far used only for notifying the userspace of the |
| * key being pressed, not for kernel being informed about keyboard interrupts. |
| */ |
| static irq_t sgcn_irq; |
| /* true iff the kernel driver should ignore pressed keys */ |
| static bool kbd_disabled; |
| |
| // TODO think of a way how to synchronize accesses to SGCN buffer between the kernel and the userspace |
| |
| /* |
| * Ensures that writing to the buffer and consequent update of the write pointer |
| * are together one atomic operation. |
| 145,21 → 130,21 |
|---|
| |
| |
| /* functions referenced from definitions of I/O operations structures */ |
| static void sgcn_noop(chardev_t *); |
| static void sgcn_putchar(chardev_t *, const char, bool); |
| static char sgcn_key_read(chardev_t *); |
| static void sgcn_putchar(outdev_t *, const char, bool); |
| |
| /** character device operations */ |
| static chardev_operations_t sgcn_ops = { |
| .suspend = sgcn_noop, |
| .resume = sgcn_noop, |
| .read = sgcn_key_read, |
| /** SGCN output device operations */ |
| static outdev_operations_t sgcnout_ops = { |
| .write = sgcn_putchar |
| }; |
| |
| /** SGCN character device */ |
| chardev_t sgcn_io; |
| /** SGCN input device operations */ |
| static indev_operations_t sgcnin_ops = { |
| .poll = NULL |
| }; |
| |
| static indev_t sgcnin; /**< SGCN input device. */ |
| static outdev_t sgcnout; /**< SGCN output device. */ |
| |
| /** |
| * Set some sysinfo values (SRAM address and SRAM size). |
| */ |
| 167,7 → 152,7 |
|---|
| { |
| sysinfo_set_item_val("sram.area.size", NULL, MAPPED_AREA_SIZE); |
| sysinfo_set_item_val("sram.address.physical", NULL, |
| sram_begin_physical); |
| sram_begin_physical); |
| } |
| |
| /** |
| 178,9 → 163,6 |
|---|
| * property of the "/chosen" OBP node. The sram_begin variable will |
| * be set to the virtual address which maps to the SRAM physical |
| * address. |
| * |
| * It also registers the physical area of SRAM and sets some sysinfo |
| * values (SRAM address and SRAM size). |
| */ |
| static void init_sram_begin(void) |
| { |
| 199,7 → 181,7 |
|---|
| panic("Cannot find SRAM TOC."); |
| |
| sram_begin_physical = SBBC_START + SBBC_SRAM_OFFSET |
| + *((uint32_t *) iosram_toc->value); |
| + *((uint32_t *) iosram_toc->value); |
| sram_begin = hw_map(sram_begin_physical, MAPPED_AREA_SIZE); |
| |
| register_sram(sram_begin_physical); |
| 218,6 → 200,11 |
|---|
| */ |
| static void sgcn_buffer_begin_init(void) |
| { |
| static bool initialized; |
| |
| if (initialized) |
| return; |
| |
| init_sram_begin(); |
| |
| ASSERT(strcmp(SRAM_TOC->magic, SRAM_TOC_MAGIC) == 0); |
| 233,17 → 220,12 |
|---|
| sgcn_buffer_begin = sram_begin + SRAM_TOC->keys[i].offset; |
| |
| sysinfo_set_item_val("sram.buffer.offset", NULL, |
| SRAM_TOC->keys[i].offset); |
| SRAM_TOC->keys[i].offset); |
| |
| initialized = true; |
| } |
| |
| /** |
| * Default suspend/resume operation for the input device. |
| */ |
| static void sgcn_noop(chardev_t *d) |
| { |
| } |
| |
| /** |
| * Writes a single character to the SGCN (circular) output buffer |
| * and updates the output write pointer so that SGCN gets to know |
| * that the character has been written. |
| 256,7 → 238,7 |
|---|
| |
| /* we need pointers to volatile variables */ |
| volatile char *buf_ptr = (volatile char *) |
| SGCN_BUFFER(char, SGCN_BUFFER_HEADER->out_wrptr); |
| SGCN_BUFFER(char, SGCN_BUFFER_HEADER->out_wrptr); |
| volatile uint32_t *out_wrptr_ptr = &(SGCN_BUFFER_HEADER->out_wrptr); |
| volatile uint32_t *out_rdptr_ptr = &(SGCN_BUFFER_HEADER->out_rdptr); |
| |
| 286,7 → 268,7 |
|---|
| * feed character is written ('\n'), the carriage return character ('\r') is |
| * written straight away. |
| */ |
| static void sgcn_putchar(struct chardev * cd, const char c, bool silent) |
| static void sgcn_putchar(outdev_t *od, const char c, bool silent) |
| { |
| if (!silent) { |
| spinlock_lock(&sgcn_output_lock); |
| 300,49 → 282,11 |
|---|
| } |
| |
| /** |
| * Called when actively reading the character. Not implemented yet. |
| */ |
| static char sgcn_key_read(chardev_t *d) |
| { |
| return (char) 0; |
| } |
| |
| /** |
| * The driver works in polled mode, so no interrupt should be handled by it. |
| */ |
| static irq_ownership_t sgcn_claim(irq_t *irq) |
| { |
| return IRQ_DECLINE; |
| } |
| |
| /** |
| * The driver works in polled mode, so no interrupt should be handled by it. |
| */ |
| static void sgcn_irq_handler(irq_t *irq) |
| { |
| panic("Not yet implemented, SGCN works in polled mode."); |
| } |
| |
| /** |
| * Grabs the input for kernel. |
| */ |
| void sgcn_grab(void) |
| { |
| ipl_t ipl = interrupts_disable(); |
| |
| volatile uint32_t *in_wrptr_ptr = &(SGCN_BUFFER_HEADER->in_wrptr); |
| volatile uint32_t *in_rdptr_ptr = &(SGCN_BUFFER_HEADER->in_rdptr); |
| |
| /* skip all the user typed before the grab and hasn't been processed */ |
| spinlock_lock(&sgcn_input_lock); |
| *in_rdptr_ptr = *in_wrptr_ptr; |
| spinlock_unlock(&sgcn_input_lock); |
| |
| spinlock_lock(&sgcn_irq.lock); |
| sgcn_irq.notif_cfg.notify = false; |
| spinlock_unlock(&sgcn_irq.lock); |
| |
| interrupts_restore(ipl); |
| kbd_disabled = true; |
| } |
| |
| /** |
| 350,12 → 294,7 |
|---|
| */ |
| void sgcn_release(void) |
| { |
| ipl_t ipl = interrupts_disable(); |
| spinlock_lock(&sgcn_irq.lock); |
| if (sgcn_irq.notif_cfg.answerbox) |
| sgcn_irq.notif_cfg.notify = true; |
| spinlock_unlock(&sgcn_irq.lock); |
| interrupts_restore(ipl); |
| kbd_disabled = true; |
| } |
| |
| /** |
| 363,74 → 302,82 |
|---|
| * there are some unread characters in the input queue. If so, it picks them up |
| * and sends them to the upper layers of HelenOS. |
| */ |
| void sgcn_poll(void) |
| static void sgcn_poll() |
| { |
| uint32_t begin = SGCN_BUFFER_HEADER->in_begin; |
| uint32_t end = SGCN_BUFFER_HEADER->in_end; |
| uint32_t size = end - begin; |
| |
| |
| if (kbd_disabled) |
| return; |
| |
| spinlock_lock(&sgcn_input_lock); |
| |
| ipl_t ipl = interrupts_disable(); |
| spinlock_lock(&sgcn_irq.lock); |
| |
| /* we need pointers to volatile variables */ |
| volatile char *buf_ptr = (volatile char *) |
| SGCN_BUFFER(char, SGCN_BUFFER_HEADER->in_rdptr); |
| SGCN_BUFFER(char, SGCN_BUFFER_HEADER->in_rdptr); |
| volatile uint32_t *in_wrptr_ptr = &(SGCN_BUFFER_HEADER->in_wrptr); |
| volatile uint32_t *in_rdptr_ptr = &(SGCN_BUFFER_HEADER->in_rdptr); |
| |
| if (*in_rdptr_ptr != *in_wrptr_ptr) { |
| /* XXX: send notification to userspace */ |
| } |
| |
| spinlock_unlock(&sgcn_irq.lock); |
| interrupts_restore(ipl); |
| |
| while (*in_rdptr_ptr != *in_wrptr_ptr) { |
| |
| buf_ptr = (volatile char *) |
| SGCN_BUFFER(char, SGCN_BUFFER_HEADER->in_rdptr); |
| SGCN_BUFFER(char, SGCN_BUFFER_HEADER->in_rdptr); |
| char c = *buf_ptr; |
| *in_rdptr_ptr = (((*in_rdptr_ptr) - begin + 1) % size) + begin; |
| |
| if (c == '\r') { |
| c = '\n'; |
| } |
| chardev_push_character(&sgcn_io, c); |
| indev_push_character(&sgcnin, c); |
| } |
| |
| |
| spinlock_unlock(&sgcn_input_lock); |
| } |
| |
| /** |
| * A public function which initializes I/O from/to Serengeti console |
| * and sets it as a default input/output. |
| * Polling thread function. |
| */ |
| void sgcn_init(void) |
| static void kkbdpoll(void *arg) { |
| while (1) { |
| if (!silent) { |
| sgcn_poll(); |
| } |
| thread_usleep(POLL_INTERVAL); |
| } |
| } |
| |
| /** |
| * A public function which initializes input from the Serengeti console. |
| */ |
| indev_t *sgcnin_init(void) |
| { |
| sgcn_buffer_begin_init(); |
| |
| kbd_type = KBD_SGCN; |
| |
| devno_t devno = device_assign_devno(); |
| irq_initialize(&sgcn_irq); |
| sgcn_irq.devno = devno; |
| sgcn_irq.inr = FICTIONAL_INR; |
| sgcn_irq.claim = sgcn_claim; |
| sgcn_irq.handler = sgcn_irq_handler; |
| irq_register(&sgcn_irq); |
| |
| sysinfo_set_item_val("kbd", NULL, true); |
| sysinfo_set_item_val("kbd.type", NULL, KBD_SGCN); |
| sysinfo_set_item_val("kbd.devno", NULL, devno); |
| sysinfo_set_item_val("kbd.inr", NULL, FICTIONAL_INR); |
| sysinfo_set_item_val("fb.kind", NULL, 4); |
| |
| thread_t *t = thread_create(kkbdpoll, NULL, TASK, 0, "kkbdpoll", true); |
| if (!t) |
| panic("Cannot create kkbdpoll."); |
| thread_ready(t); |
| |
| chardev_initialize("sgcn_io", &sgcn_io, &sgcn_ops); |
| stdin = &sgcn_io; |
| stdout = &sgcn_io; |
| indev_initialize("sgcnin", &sgcnin, &sgcnin_ops); |
| |
| return &sgcnin; |
| } |
| |
| /** |
| * A public function which initializes output to the Serengeti console. |
| */ |
| void sgcnout_init(void) |
| { |
| sgcn_buffer_begin_init(); |
| |
| sysinfo_set_item_val("fb.kind", NULL, 4); |
| |
| outdev_initialize("sgcnout", &sgcnout, &sgcnout_ops); |
| stdout = &sgcnout; |
| } |
| |
| /** @} |
| */ |