bstanwell/wch-uf2-example
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refactor common scsi hardcoded answers

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R
2024-04-14 05:15:23 +01:00
parent 078281f6f2
commit 3c01843d1e
2 changed files with 34 additions and 34 deletions
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bootloader.c
+29 -29
View File
@@ -242,6 +242,30 @@ __attribute__((always_inline)) static inline uint32_t min(uint32_t a, uint32_t b
return b;
}
const uint8_t MODE_SENSE_6[4] __attribute__((aligned(2))) = {
0x03, 0x00, 0x00, 0x00,
};
const uint8_t MODE_SENSE_10[8] __attribute__((aligned(2))) = {
0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
const uint8_t READ_FORMAT_CAPACITY[12] __attribute__((aligned(2))) = {
0x00, 0x00, 0x00,
0x08,
0x00, 0x00, 0x40, 0x00, // 8 MiB
0x02, // formatted media
0x00, 0x02, 0x00, // 512 bytes / sector
};
const uint8_t READ_CAPACITY[8] __attribute__((aligned(2))) = {
0x00, 0x00, 0x3f, 0xff, // 8 MiB
0x00, 0x00, 0x02, 0x00,
};
static void ep1_send_hardcoded_response(const uint16_t *data, uint32_t len) {
for (uint32_t i = 0; i < (len + 1) / 2; i++)
USB_EP1_IN(i * 2) = data[i];
USB_DESCS[1].count_tx = len;
set_ep_mode(1, 1, USB_EPTYPE_BULK, USB_STAT_STALL, USB_STAT_ACK, 0, 0);
}
static void synthesize_block(uint32_t block, uint32_t piece) {
if (block == 0 || block == 65 || block == 66 || block == 67) {
const uint16_t *sector_ptr;
@@ -592,11 +616,7 @@ __attribute__((naked)) int main(void) {
case 0x12:
// inquiry
if (USB_EP1_OUT(16) == 0) {
for (int i = 0; i < 36 / 2; i++) {
USB_EP1_IN(i * 2) = ((uint16_t*)INQUIRY_RESPONSE)[i];
}
USB_DESCS[1].count_tx = 36;
set_ep_mode(1, 1, USB_EPTYPE_BULK, USB_STAT_STALL, USB_STAT_ACK, 0, 0);
ep1_send_hardcoded_response((uint16_t*)INQUIRY_RESPONSE, sizeof(INQUIRY_RESPONSE));
msc_state = STATE_SENT_DATA_IN;
break;
}
@@ -605,10 +625,7 @@ __attribute__((naked)) int main(void) {
break;
case 0x1a:
// mode sense (6)
USB_EP1_IN(0) = 0x0003;
USB_EP1_IN(2) = 0x0000;
USB_DESCS[1].count_tx = 4;
set_ep_mode(1, 1, USB_EPTYPE_BULK, USB_STAT_STALL, USB_STAT_ACK, 0, 0);
ep1_send_hardcoded_response((uint16_t*)MODE_SENSE_6, sizeof(MODE_SENSE_6));
msc_state = STATE_SENT_DATA_IN;
break;
case 0x1b:
@@ -622,35 +639,18 @@ __attribute__((naked)) int main(void) {
break;
case 0x23:
// read format capacity
USB_EP1_IN(0) = 0x0000;
USB_EP1_IN(2) = 0x0800;
USB_EP1_IN(4) = 0x0000; // 8 MiB
USB_EP1_IN(6) = 0x0040;
USB_EP1_IN(8) = 0x0002; // formatted media, 512 byte sectors
USB_EP1_IN(10) = 0x0002;
USB_DESCS[1].count_tx = 12;
set_ep_mode(1, 1, USB_EPTYPE_BULK, USB_STAT_STALL, USB_STAT_ACK, 0, 0);
ep1_send_hardcoded_response((uint16_t*)READ_FORMAT_CAPACITY, sizeof(READ_FORMAT_CAPACITY));
msc_state = STATE_SENT_DATA_IN;
break;
case 0x5a:
// mode sense (10)
USB_EP1_IN(0) = 0x0800;
USB_EP1_IN(2) = 0x0000;
USB_EP1_IN(4) = 0x0000;
USB_EP1_IN(6) = 0x0000;
USB_DESCS[1].count_tx = 8;
set_ep_mode(1, 1, USB_EPTYPE_BULK, USB_STAT_STALL, USB_STAT_ACK, 0, 0);
ep1_send_hardcoded_response((uint16_t*)MODE_SENSE_10, sizeof(MODE_SENSE_10));
msc_state = STATE_SENT_DATA_IN;
break;
case 0x25:
// READ CAPACITY (10)
// xxx don't bother checking the silly fields
USB_EP1_IN(0) = 0x0000; // 8 MiB
USB_EP1_IN(2) = 0xff3f;
USB_EP1_IN(4) = 0x0000; // 512 byte sectors
USB_EP1_IN(6) = 0x0002;
USB_DESCS[1].count_tx = 8;
set_ep_mode(1, 1, USB_EPTYPE_BULK, USB_STAT_STALL, USB_STAT_ACK, 0, 0);
ep1_send_hardcoded_response((uint16_t*)READ_CAPACITY, sizeof(READ_CAPACITY));
msc_state = STATE_SENT_DATA_IN;
break;
case 0x28:
linker.lds
+5 -5
View File
@@ -24,6 +24,11 @@ SECTIONS
*(.rodata)
*(.rodata*)
*(.gnu.linkonce.t.*)
*(.srodata.cst16)
*(.srodata.cst8)
*(.srodata.cst4)
*(.srodata.cst2)
*(.srodata .srodata.*)
. = ALIGN(4);
} >FLASH
@@ -41,11 +46,6 @@ SECTIONS
*(.sdata2.*)
*(.gnu.linkonce.s.*)
. = ALIGN(4);
*(.srodata.cst16)
*(.srodata.cst8)
*(.srodata.cst4)
*(.srodata.cst2)
*(.srodata .srodata.*)
. = ALIGN(4);
PROVIDE( _edata = .);
} >LOL_NO_RAM AT>FLASH