[WIP] Pile of stuff

[pistorm] / gpio / ps_protocol.h

diff --git a/gpio/ps_protocol.h b/gpio/ps_protocol.h
new file mode 100644 (file)
index 0000000..c3c3a3f
--- /dev/null
+++ b/gpio/ps_protocol.h
@@ -0,0 +1,94 @@
+/*
+    Code reorganized and rewritten by 
+    Niklas Ekström 2021 (https://github.com/niklasekstrom)
+*/
+
+#ifndef _PS_PROTOCOL_H
+#define _PS_PROTOCOL_H
+
+#define PIN_TXN_IN_PROGRESS 0
+#define PIN_IPL_ZERO 1
+#define PIN_A0 2
+#define PIN_A1 3
+#define PIN_CLK 4
+#define PIN_UNUSED 5
+#define PIN_RD 6
+#define PIN_WR 7
+#define PIN_D(x) (8 + x)
+
+#define REG_DATA 0
+#define REG_ADDR_LO 1
+#define REG_ADDR_HI 2
+#define REG_STATUS 3
+
+#define STATUS_BIT_INIT 1
+#define STATUS_BIT_RESET 2
+
+#define STATUS_MASK_IPL 0xe000
+#define STATUS_SHIFT_IPL 13
+
+//#define BCM2708_PERI_BASE 0x20000000  // pi0-1
+//#define BCM2708_PERI_BASE    0xFE000000  // pi4
+#define BCM2708_PERI_BASE 0x3F000000  // pi3
+#define BCM2708_PERI_SIZE 0x01000000
+
+#define GPIO_ADDR 0x200000 /* GPIO controller */
+#define GPCLK_ADDR 0x101000
+
+#define GPIO_BASE (BCM2708_PERI_BASE + 0x200000) /* GPIO controller */
+#define GPCLK_BASE (BCM2708_PERI_BASE + 0x101000)
+
+#define CLK_PASSWD 0x5a000000
+#define CLK_GP0_CTL 0x070
+#define CLK_GP0_DIV 0x074
+
+// GPIO setup macros. Always use INP_GPIO(x) before using OUT_GPIO(x) or
+// SET_GPIO_ALT(x,y)
+#define INP_GPIO(g) *(gpio + ((g) / 10)) &= ~(7 << (((g) % 10) * 3))
+#define OUT_GPIO(g) *(gpio + ((g) / 10)) |= (1 << (((g) % 10) * 3))
+#define SET_GPIO_ALT(g, a)  \
+  *(gpio + (((g) / 10))) |= \
+      (((a) <= 3 ? (a) + 4 : (a) == 4 ? 3 : 2) << (((g) % 10) * 3))
+
+#define GPIO_PULL *(gpio + 37)      // Pull up/pull down
+#define GPIO_PULLCLK0 *(gpio + 38)  // Pull up/pull down clock
+
+#define GPFSEL0_INPUT 0x0024c240
+#define GPFSEL1_INPUT 0x00000000
+#define GPFSEL2_INPUT 0x00000000
+
+#define GPFSEL0_OUTPUT 0x0924c240
+#define GPFSEL1_OUTPUT 0x09249249
+#define GPFSEL2_OUTPUT 0x00000249
+
+unsigned int ps_read_8(unsigned int address);
+unsigned int ps_read_16(unsigned int address);
+unsigned int ps_read_32(unsigned int address);
+
+void ps_write_8(unsigned int address, unsigned int data);
+void ps_write_16(unsigned int address, unsigned int data);
+void ps_write_32(unsigned int address, unsigned int data);
+
+unsigned int ps_read_status_reg();
+void ps_write_status_reg(unsigned int value);
+
+void ps_setup_protocol();
+void ps_reset_state_machine();
+void ps_pulse_reset();
+
+unsigned int ps_get_ipl_zero();
+
+#define read8 ps_read_8
+#define read16 ps_read_16
+#define read32 ps_read_32
+
+#define write8 ps_write_8
+#define write16 ps_write_16
+#define write32 ps_write_32
+
+#define write_reg ps_write_status_reg
+#define read_reg ps_read_status_reg
+
+#define gpio_get_irq ps_get_ipl_zero
+
+#endif /* _PS_PROTOCOL_H */