115 lines
3.2 KiB
C
115 lines
3.2 KiB
C
// vim: set et:
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#ifndef M_ISP_MEHFET
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#define M_ISP_MEHFET
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#include <stdint.h>
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#include <stdbool.h>
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#define MEHFET_PROTO_VER 0x0001
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void mehfet_init(void);
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void mehfet_deinit(void);
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void mehfet_task(void);
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enum mehfet_cmd {
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mehfet_info = 0x01,
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mehfet_status = 0x02,
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mehfet_connect = 0x03,
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mehfet_disconnect = 0x04,
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mehfet_delay = 0x05,
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mehfet_set_clkspeed = 0x06,
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mehfet_get_old_lines = 0x07,
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mehfet_tdio_seq = 0x08,
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mehfet_tms_seq = 0x09,
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mehfet_tclk_edge = 0x0a,
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mehfet_tclk_burst = 0x0b,
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mehfet_reset_tap = 0x0c,
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mehfet_irshift = 0x0d,
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mehfet_drshift = 0x0e,
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mehfet_loop = 0x0f,
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};
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enum mehfet_status {
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mehfet_ok = 0x00,
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mehfet_badargs = 0x7b,
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mehfet_nocaps = 0x7c,
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mehfet_badstate = 0x7d,
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mehfet_invalidcmd = 0x7e,
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mehfet_error = 0x7f
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};
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enum mehfet_caps {
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mehfet_cap_jtag_noentry = 1<<0,
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mehfet_cap_jtag_entryseq = 1<<1,
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mehfet_cap_sbw_entryseq = 1<<2,
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mehfet_cap_has_reset_tap = 1<< 8,
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mehfet_cap_has_irshift = 1<< 9,
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mehfet_cap_has_drshift = 1<<10,
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mehfet_cap_has_loop = 1<<11,
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};
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enum mehfet_conn {
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mehfet_conn_none = 0,
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mehfet_conn_auto = 0,
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mehfet_conn_jtag_noentry = 1,
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mehfet_conn_jtag_entryseq = 2,
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mehfet_conn_sbw_entryseq = 3,
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mehfet_conn_typemask = 0x7f,
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mehfet_conn_nrstmask = 0x80
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};
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enum mehfet_resettap_flags {
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mehfet_rsttap_do_reset = 1<<0, // reset TAP to run-test/idle state
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mehfet_rsttap_fuse_do = 1<<1, // perform fuse check procedure (TMS pulses) on target
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mehfet_rsttap_fuse_read = 1<<2, // check whether the JTAG fuse has been blown
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mehfet_rsttap_highspeed = 1<<3, // can move to high-speed transport afterwards
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// (fuse check procedure is max 50 kHz)
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};
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enum mehfet_resettap_status {
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mehfet_rsttap_fuse_blown = 0x80
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};
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// hw routines
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void mehfet_hw_init(void);
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void mehfet_hw_deinit(void);
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__attribute__((__const__))
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enum mehfet_caps mehfet_hw_get_caps(void);
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const char* /*error string, NULL if no error*/ mehfet_hw_connect(enum mehfet_conn conn);
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void mehfet_hw_disconnect(void);
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void mehfet_hw_delay_ms(uint32_t t);
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void mehfet_hw_delay_us(uint32_t t);
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void mehfet_hw_timer_start(bool us, uint32_t to_reach);
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bool mehfet_hw_timer_reached(void);
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void mehfet_hw_set_clkspeed(bool fast);
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uint8_t mehfet_hw_get_old_lines(void);
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void mehfet_hw_tdio_seq(uint32_t ncyc, bool tmslvl, const uint8_t* tdi, uint8_t* tdo);
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void mehfet_hw_tms_seq(uint32_t ncyc, bool tdilvl, const uint8_t* tms);
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void mehfet_hw_tclk_edge(bool newtclk);
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void mehfet_hw_tclk_burst(uint32_t ncyc);
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enum mehfet_resettap_status mehfet_hw_reset_tap(enum mehfet_resettap_flags flags);
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uint8_t mehfet_hw_shift_ir(uint8_t newir);
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// drin is not const here, as the implementation may want to shuffle stuff around
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void mehfet_hw_shift_dr(uint32_t nbits, uint8_t* drin, uint8_t* drout);
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static inline uint16_t mehfet_hw_shift_dr16(uint16_t newdr) {
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uint8_t drin[2], drout[2];
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drin[0] = (uint8_t)newdr;
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drin[1] = (uint8_t)(newdr >> 8);
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mehfet_hw_shift_dr(16, drin, drout);
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return drout[0] | ((uint16_t)drout[1] << 8);
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}
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#endif
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